1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8654ab4be0be319362eca37ec302d52963d95ae0627edf082e903987dd18800c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6417e66d-29db-4487-85e2-2b14a1a98f41.json and https://artists.proofprofile.net/proofs/artist/6417e66d-29db-4487-85e2-2b14a1a98f41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731cb2a654a755270112c61431380521784ab31de08054f3c01e6393725f9d68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9393fe6ea95fa8f3239b03d9dbdb4bb87ed37431f24b2b4bcbebd0c492061ee3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6094ab675d52f9ef2a814294011cc06ebb21bc93959f52e37836ecd2d8b011ec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9e5a3f5c4d62306d9ad04095cf38ba22e7faee29b14be47a79e9888ece0910. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f70435f635e213a5fe3bde2ff3be9f9e76cae9d3c3b49731b093ba14520816. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b0409b50199c2b0974626cfde067b1cb4999368a19f7deb690e56843e3a2e0. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126768.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe53566f0a27597c097618b6446544408f524ccd334ec6bb311235e7b300e01. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85a9b2c7367c196e798d600b8adb18ad81296c674014eff5ad6323df5251d8e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3aaed64ab01421beb10e6d14a20a951bf52fd778a33a19edca61ea8c513340. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA012126774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ccdeb1eb055139c50e8630477e1f9ee711a2c36fa4bcd2985c5a414080ee44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452045990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30826cb6cb2a71a7d8fb00152b1f1b03de960dfc36a636e136a8cbf32b0eab5a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452084306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5197c91a487b20f77599424b1abe3ce699bec624cf58a54d7af6895af4bd107a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452068142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf64079aef3cff771fd806f2acafeb8ffadec6c280f56990e6c9f371939788e2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452088529.
While We Are Walking - Piano Only Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27386de2210b8fa3d8fa1bbc3f4a572507c6b8fcdec7753daf808dac80e83eb6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452050348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ad7b7f4282a8393282d06be52dce45c0d1d3702a13b23d7bd11fadead15e3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452067012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2996628bf7a380cb586836720a2a5fd900d79b64b39b7aa1383a513e01ff9f65. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc867427fdf97c65cacf6b242830c94c1a8ea7b1d0878ad8c3fc8ad4eeaaff0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd817ed6ceebc41bd943fe514de8237c6ba40b75d6a5ad4121f3b77cea7cd59a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac6ec5730bfedaa885656fbc3d17437508e3f03169ec3ac8ebd203b7bfd2b5e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65ec5ac2e705981a070dc86ead43b3a6c7fe9e60767d9d0a8844d9b8bcf2d47. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c300e63df88b17b7ed5492cff1002a54f582f4e34b40bad12dc53bbe529fd90. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ccb44aa212e21e6bf6cf4c186a1606747379c69ca9f43e89351ba8560c3e1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5d639a5f146007aaee44a08d3c8273a58ac2f8820fbf9ccee15e93a8f73140. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b06b247dbbc136bb025e902a26d913bb18c4739a06e30fe566001e443b5a13. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa101d8e5fcee274e03459216a335c5ae66d4316fe612da764accf8ee101fd20. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452007692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc2e836979172e585a889717e93fee7924898a595664ffd87fada5d7e945254. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dea26ca66aab9b77df536bce66f50f50e6fb1864c3e92745ffbbfb09ba00d0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae07eba0a038c02e36ae16ca6a69e398a57425d81c58959b2803f6a2bb38b35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985df47c8242860e0447e3bb59d56d047de70c85ee1e817063a70f31fbb0e027. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c28c881c9407e7e18dfeb29fc21a4fe3999a2bd41c6484502181b63abec3f9d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf608b4ac705d9c612c5c16702488a9e7e802baad479dfd1216e0d6e8bbdb1fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0a84f1bd7248cdb2f7a49facd66385ceb9a51172db17c00d9a219cadb78a6d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8456a6a74e3e0a43337040d452db5939858b59850924f6a560baccbf219b426. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f244429bcf7ae7f44664eb507dcb3293260e8021c189ad1391bb7c11f419c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7281f82da3d2b33f11e5b014c823a32b4d10cf1c5b2e90fffddfc8e0e92c296e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae637269aaed5fd014d6fca22e9a7413c0d62b5a7863032df86ca93df6000602. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF452001234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9effd085b18ea60ac171f69b0e4e409e93916c1dc4a947048f0c446d21e3af. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRF632002649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734b155612e547c5357669151aab6c9ea13262a25d1df261aa17f9d726f3232e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRF632002650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5778ca842aa7804ec63a5f8f1497e55ef09cdd39d973a699a8ef78765d878ce4. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRF632002653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aef64a4b39d54d71e3b5277dcc4040ca0b2fce1b6b78b738b85173bd1d0547. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRF632002648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6d3ba0ecd1bb011973ea879f5dd6eb5eed601d1af52a5cbfce98b71997bd74. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRF632002651.