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 0x50746e13bd72a8f2b28d65219940ad531ec641ffb12c8d1b11e29886ccbec8bb. 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/b9ac98eb-44d5-4c0e-8082-4483588bdb6d.json and https://artists.proofprofile.net/proofs/artist/b9ac98eb-44d5-4c0e-8082-4483588bdb6d.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 0xba18e7fdda180a8e7248931d43b3159981149807a5db2bf7e2636b5c84f9c7a9. 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/QM6N21537718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53782a8916ce63202ecce3113472acab4412068b8e8f553737c1f286ee14101. 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/QM6N21537719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe863b37969c0f3dbd3932c53f075a9c249439959c5f9b2c1068f7998601d9f63. 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/QM6N21537720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae370d2a569e37b5fbfea8ee4b0135ea3b9c1ad4aa880f83c48b2f239a9eb14c. 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/QM6N21537721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff0d5c47f9e8100d04b79d45d4fc94e1af682a65acdd1bbdbaa3c7294d822c. 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/QM6N21537722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f78709708915688032767a72ac9ae6d6e2b8e059b4ef5a53e08a90b76f9bf7. 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/QM6N21537724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031832bc0055450843ec22d1f836800de472c3cdcf029439af7354d912a4881f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:52:06Z), 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/QM6N21537725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088b6e3060db61c81bfb7f3b21ba0f0f141d31fb218ba63df05322d88e57929a. 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/QM6N21537728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c601952ce6ee298408059239c66f7c987db4b8666b0d1c62e09cf89b7c76e7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM6N21537723.
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 0xf0b866d5a8b48a99fb354b24cca63a8ae18ebac2de338b3d7d45eb278b9638e5. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6N21537726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdc04637408fba37ee3bbf1c4c9b38b01e3bdb9a9b0129dced4aa52ccc5f589. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QM6N21537727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cc46939575e1c4bedb4ba0a7a88323855789f2c74877db134e9c1609113b33. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM6N21537729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74905eb40b6fca69c398f3a076dd4c3afe19363ceef62ee404bb934a1b5e424. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6N21537730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43326c3b32c62139a1867c2e9a41d79eee615726298aea1f3b946d3ac8a81ec5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:47Z), 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/PTVI11600113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5911e7ea038ad520a381d4d1080a24d8d333ab946c98687cc4cc4f1884ec85. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:26Z), 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/PTVI12300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000c2a50ce7c5029ac0e436eac38fbdb5acc40b8226ce4fcc8e8a55cb472c73c. 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/PTVI12400692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53a5e461c2daea2f21c8cad9c42438524e8a60cd9ac23f7b76ec78e25003841. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/PTVI12401223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd99673c648c0f64d5515f6cbf9ccfe6abb40299fa3b3ef18960b55d329472f. 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/PTVI11900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b0e24681e3686a0cab3b1571f817e6e3f6f33487f767958d78215813c0331d. 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/PTVI11700248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1aa2179bc0e8082c53c71b27acc40c6340e1ec86aeb3276120310a3fed658. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE6TI2024721.