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 0xbf51d09595c1cb269fa22dd809157ebb85244d74afb92b9dc2edf9bdd3c9865c. 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/9f79f1e2-f2fb-4efa-b6ef-1a82cc5c401c.json and https://artists.proofprofile.net/proofs/artist/9f79f1e2-f2fb-4efa-b6ef-1a82cc5c401c.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 0xdece47d59df4348c25de0bf43f0bf1392e710071c927f0ee0e421387c092b761. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP42354755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bcd1c856672612bfdc0da5501258967cd4d83236f2193b36783c011d5a4948. 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/QZTB52259017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa010d5248f18a1224e2c88fa622fb00a179c08ef5ae81ab2bc7e318d44bab97. 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/QZTB52259018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e1efa5c5512f8d37570629fb5c6beedc3ad7b1f1808c3c8ce23daff25d750. 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/QZTB52259019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952a3c1e1ad9f3dd64017a27a07fca20a0f94e9554c45688c9a560de3e845264. 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/QZTB52259020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21877aa599200b38f487c7dd0b6b4693e1c58501f307d2dcba12c60849d1b16. 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/QZTB52259021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f1298eac660278d6a7853ff548f830af43f4b9ccede14ed9d496437447b60. 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/QZTB52259022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142c4c4622c6d13d55665b2e6a5424f15a845e1cc7213c9511cf2796d73af521. 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/QZTB52259023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc401676f981326b8aa639169e2a04e1c527ee50941e5d6380f514136e477bed. 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/QZTB52259024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff96f443355b5ba37df226b09cd008ad2a23ad11ddc387f0fb4b2534f58aa4d0. 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/QZTB52259025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c58023f2342081cf43b4528d4646ce55165b72068f964a9fe185d8f00897c7. 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/QZTB52259026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edcaba82dc645f24f7cc4f4d76a860e4549a463f514c646c9a71dd8905025d8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB52259027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0d0bd6dd4c3ba5b70ca71218520b2c3caee99e5b13c26edbdaeb68fa0bb6da. 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/QZFZ72393233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d8560eb98ab2db07785c025d13415017ec4e0d7055212716ee0287df4fde3f. 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/QZFZ72393236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb47b9ab0cdb4005e025577be62efaccda19afbcb73dc355729fff0d76131c3. 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/QZFZ72393237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63317503fe28b85155992e41cd1e08132724d92f51bf8815ffc8068bc6bdfaf9. 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/QZFZ72393238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6652226c7cb85716f012ebb7a0f1453f7ba0e7357b92b8237f15d1207520a5e7. 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/QZFZ72393242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe126c875f07bef5cedffbb8a1cfda94069bbd6c9600a2bc01657a70fd77e1f4d. 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/QZFZ72393243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6201747eecb63176a5ca3e332a502408e806dc1333c5eca60741331af8e2d4c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ72393244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b7cedb6afb1d2d39871450141867642a33fdf98f0f3cb0d5bdfff9b1b71fa. 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/QZFZ72393248.