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 0xd02eddc7101c26605a23bf6612fab031b57cc75f5e3d937959a5fca0d787534b. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13f40c2a-3a15-45ad-870a-f01930150b48.json and https://artists.proofprofile.net/proofs/artist/13f40c2a-3a15-45ad-870a-f01930150b48.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 0x86c71f9919a938e62505084046c0cb496fcae3e51c49b5c29f339330e9cc0382. 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/DGA072311388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb33dc864b3fee8e4401c647af4ef48aa2991b047ccbc5cd53b1907732932a. 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/UKU932287182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186660a0d763ea5650618a1be338542510b2b05c904e5f43c917e19d1cc5756b. 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/UKU932287183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3339600b30d15f5ad2944ebb97504817af1511a7d8992608c92732179720497d. 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/UKU932287185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde30e597ca66149b4b794fec6e3c0c0ea5f8436be8a8e5a13afe8b191651b7cd. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UKU932287181.
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 0x6e578c3cd25c7b13ecd9cd63439a284f7036c817ecd9ea16fbaa84df14b7851b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UKU932287184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bc0de59b79a6891db48378d90492aa609d58022f47b51a23df44dfb5e80b8f. 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/UKEX32215173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf081724afac3c3bcc25ed8e320dc476f3bafe82754f2a0e7462d7e74e2f57. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKEX32212660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a501c5b36d019744104cf7deef60261fe11725018ee26963d0a9968f999de. 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/DGA072299674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630f74c64b0e63f40f489c2258df3430ab7e31fc7c8cd6fef5a5b4aac7fae98c. 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/DGA072299675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8aa509f0d91c8c1a773768ce8d7e187773a1a9f1d4fc80dda022f04a334f30. 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/DGA072299676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7ef63e5acca99027aded52ca08a9058ee75fadc7a27d8f1fc718238cccde71. 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/DGA072299677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9c74ae9a8fd1043ddfe3f85f1a1d596bb793eace18bdaa3270a1892025061f. 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/DGA072299678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0284a1eba170bc3ceda5200a6b52f1a910de36e5d1684f1928dfd0cdf4b23a0. 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/UKEX32227188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372f3ba1d365dac6e23aeb311569e9c7d386bc7c3fe3da8d397707e707a7da73. 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/UKEX32227192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f701c9b40d84e907237ea70475b93dca5a74cbeabcdb80791fb4ccc97639d28. 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/FRX282427229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e30807605866f976beb84b8c0e1077e60ecb2158f232d9e5f7086fc792e18. 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/FRX282427231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abefa721385262f766216a4e6327a736a1e6f0e38ec826aeebc3a4d90ae3da8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282427232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c429b593036f9276d374409917ff68d713b14ede45e40582ded7e4703b04f0. 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/FRX282427233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7281d5896c390a6cfc4135fcedd980b3aca591458675aad8ea7979309a78a9da. 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/FRX282427234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ee3d78b6407c66c63aed8c68b3b9a163349fd2c86818e3f108e552504ab0f9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX282427236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d5baca658c9b5de739c8aa0d57b0f6bcedf9c59423660d2c34376f75bbfdfa. 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/UKU932259761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec7f30eaa30751fe5284dda84ada3fa61dc470f25b2787c27e66c5a807b9f9f. 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/UKU932259762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465118c62b24eac601a8f9057523aa4cf5bfead82e55a196dff8535d83f88780. 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/UKU932259767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2943f127965862d6a9cbff82923b59d4ab598c6e55874be402c80417d2009d1c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/UKU932259769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc012ab087c4b0209f3c9a2d8423d4af5d48697bea73e271ec6570d52ff8863. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKU932259768.