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 0x217165c5a1c7b7194e121d731d1da942b57462138ef50d1d4b66b75ddc6ee1e7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db825c81-3791-4267-b873-f811cb44c8e9.json and https://artists.proofprofile.net/proofs/artist/db825c81-3791-4267-b873-f811cb44c8e9.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 0x039c1dd1c3b86409eda7d609fc24eea5ae7c4b23ff353d0da64857f531b59d68. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM6DC1512541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab2226b4437e482400aa910b7d29f4061a13398725bbab2309e948223fcb178. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:32Z), 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/QM6DC1512545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aeeb46f939f5a9921e2ed1719797a0269f310e18a1912cb1d848762a8d47fa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6DC1512547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727accef23d644a8e0dba488ff996902d10acdfe1c861a0e504c27484711ba8e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QM6DC1512548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b67ac0d6e6358b24bdf0d1eac7d8c0f28083cb5475c59cd3bf94aaedbefe321. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QM6DC1512550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe560d489c7a6711151277cd7392526561ea2c6710b95cd718bc45ca10b6cf7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6DC1512551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc71c50a00816bf6519018c4246989e34f97955a6ffd1b876f1197f5443a236. 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/QM6DC1512552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf230ff341830df315a995a2cd678970cfec59749840e153d0632f25ac0a8392a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:16:47Z), 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/QM6DC1517340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cb597b213d79a806be08ab38fc545cc00c9ea5a93c96f4bd5e7745ddf55faf. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:43:45Z), 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/QM6DC1517293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee7e8f8c4def11b501583b085a6e8a7d61c4e60215c53026d594f433ef41324. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6DC1517295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5869184883c150b84c791f3c351f94ee826854d93c66f0084b85adc93173298. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM6DC1517296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49cb3b73729b1e1bed1da6054c3d9c31bc022fcc609e5fc25a4cb4e7475dd27. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM6DC1517297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6798cc48ce2fa94c5d620ae86076e54c1dea25455e5cac70faee7fb5883471c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM6DC1517298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f280f97a5b4e3f9a1e3673140f49be5e34065e44261f241d4f4d301417fe16f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6DC1517299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598935afd17694da776fa2eb0c49644f5ec42a8d3af40446cd94d9be2c141bf0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6DC1517301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023664eb7cd606d0ef4bc5f5cd0eb24cbbe308aafe86a736c0495ec9cc99e256. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:23:32Z), 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/QM6DC1517305.