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 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 0x91dd2b7adc16a884815ab1f9c35fb811a1c22c20ff89f13f52c8aa27eef80ec6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3396953-833d-43bf-8fa4-1f20b7cab60d.json and https://artists.proofprofile.net/proofs/artist/e3396953-833d-43bf-8fa4-1f20b7cab60d.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 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 0x0262278a9bac3d9cc52ea44f78060536f6438c1b3582556cfcd31b84b10f3790. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2341404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c089d824466cd2d133f63885e90a79b4571774387d81f981963c2ad19ffd72. 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/QM3DF2267812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeea8522a76e96f60902476178ce0d4b50a23fec30dcf226d98fb7cac605907. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM3DF2267813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652607efbccb31e691d5d0165014e7236e106a095fe341cf3d7f9e3a2dc98fa5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM3DF2268654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffd81256b0c1c824cadd91df961aa1a7f53153ae28a24367e4f43b1c0859e55. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QM3DF2281439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c6b3658dffb7e2f49f642a6b3fd986020e99c01941f7b22c3cd596b6d79a0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QM3DF2281440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0552f24e4a4e0a71b58f3abeb71f9f7549a701578694378770f7f5587d1e925. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QMANG2212645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dfed8443a2afbb597094f08a7fae05e493d4f327d36f0339166246d0904f76. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFE2376066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05787e605c65f628d495b7135e334ddcfbf8d090abfc44f78c9a6754aa67e18a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GXBAV2487403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7503d57796f0d50cf2c40711a5fc51f0a475c25258c52dbb19c4c104d79ad8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SGB502451254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ed81c90afca1455f15cb070ead9b5646baa4eb3d21df3d6bc7cfe0d4014f91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXD7G2495756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e4105821817b716655c33d752f93d0b3f890a63c2c01a7f6b5a7e271624d58. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2463260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3981fed14356a4c9fb9136723f000be402cfee5e44c1f53b7a5463b526968241. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKZGC2405703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafd7b35e37e3c1c2003e90f4ddb97dab0e7bab9dd3f96562e6712b3210ce791. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GXD7V2441720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27c26fc3d30f65824711c49bb34b43b94a65cd6e83906059de8b52d59f020fc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CA5KR2490909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47beff88e1d522b1dede882b5020a7a122aececfe84e9780eb6c5fca88cbc06e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AEA3A2354047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320af188e065dd69c3bc6d5ecdf54f2926a2e60293f75f8d906a194c29269a2f. 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/AEA3A2291482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461d4cedc8b22ddd6debbd5875640bb43a6a346f177314435ed2fde5cccdaa28. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SGW502231523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6708a67f96d1f5ba55ed59becf7890a3b8e80a90771d3d9a81fbd3de504aefa3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2515457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b510716baa3df45e10cacda09e3e39d001dc7594d3bdbd08066d5a822945e08. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2515458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52379536f301630a0864137384765548d98a24738038ebde559a473a6f1cb817. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2517998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a053e6bc99722ca0efdd6e0bfd116eb51cef2e4e0870f6c5b1223ec89018a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/CA5KR2517999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7adebba31201f608e21d63e5ebc12debe6178e4c2314db9d06bcdc3e5eb216. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2519452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73c63d42f91562e8b8764f0b1f2b7dbd61baca99fc2f2b14d475c88ac606a52. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/CA5KR2519454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf002f7b6291d84788b1166dbaf6d78baeeb2858da7e89671da3c2081ea805. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2531452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257926ea18657d69da3c7b84fee5e538ea5518ca3ec45b8b0f0417a718aa1a61. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA3A2181752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9312cfa7a26daba888d40be8379006d388f1aa5e462c2c839898c3a77f7a46c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GXBAV2151041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2313d8e1060732f9a8ba7ab1bb78fcf4625025fc81ba0bdac301b632a41cbdd1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXBAV2198562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15c8b51e8b46b6a5c1a14d3ff0ed4de9d2b9e8ab6b3984951a4013fbcbcbc76. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/GXBAV2012158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27376684dc99f2652d6dd5de1f1b34277f5e0c790765783d688a24755f71eaa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXBAV2126993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4f3a84c0411f62a23206b12ed92a240cf1ce0fc689fbc618b2a3e087f84038. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GXBAV2111647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf42c988a5b49289d46368f002baece0c6048b4c239b3b14ff061f64abf9aac8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXBAV2089159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9d8ca6c33009a31c81ececa92ec7f8906b62f9f8b4de4f67ebbcde7532def0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBAV2006055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb5ee408521a9c37b75bcc8ea6c4c7b1a192940f51b87ad176b17826ff745d9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2587665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae2aa47959c222d0a2aff8729c69ff2dda68046816a3b7b69edc22b67cf8bc9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2587666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681829e411802ccad66f3db852b107726d51cbcf82493beb9dcb87d0dd5fb1d8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QT5M32535700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8d2f7302f21a34e22ae8e9bd36c3143091b64ad74c3a811de89f32591c17cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2512532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdb0a93ac1bcf1dc7caf3cfdb572aa4cc329e57b0dc42ee93dac0ccec226150. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2468458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f80886d2fecc1941a2c11428b52e0ee4399265bb3c970944270fe6e70327e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2461092.