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 0xde59814035db74c148e72da844e2eb5d493e517d182d2ff09fa106664c1e9db5. 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/3c0e4a2b-89eb-4448-8d08-b5e46efb1071.json and https://artists.proofprofile.net/proofs/artist/3c0e4a2b-89eb-4448-8d08-b5e46efb1071.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 0x84ca105c02b842fd1172c240ed5d1e3c992322be70f382c1cc75caa4780c53e4. 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/DKADG2300395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bc3897030cbf2f57d6fca26835dbabed8dd7de19ba5755df4c441d1124ab46. 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/DKADG2300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07348ed0aa25a4d81c389772d9a722de67e0a946bd28dbb32d78661cca085a1c. 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/DKADG2300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f86e1db532bb0ec03bb58e2277c61baf53ba787ede96be797be83cef61b5af. 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/DKADG2300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca105c02b842fd1172c240ed5d1e3c992322be70f382c1cc75caa4780c53e4. 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/DKADG2300395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06325ef2cfecd6843e2fba1809bd7c4e783cbdfc997065045af4ad36b0a8962a. 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/DKADG2300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6769fc1e02c7d08412cc28bad2df3a9b7b68868e3039097f384e19de4a849fa. 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/DKADG2300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9c1f3919697866345902f6ab760314ed89b3fed2124d686accc93b851b85f1. 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/DKADG2300398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45ff194e93836889b553ace93008f1ca1da2ae23b8f2d42881a3bbb13c4442. 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/DK4YA2010301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ca73383b70372cf7016c56399e5b63e2822c511fba5c6cbfb703d239dc980a. 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/DK4YA2010302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b363da6e121edfa7bc43a1018cfdd8badd91e41ddef7d04cbc42ecc3d841a3. 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/DK4YA2010304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b87aee311bf74d872fbeada705a40dd2eb14d86bdaf146c508e7810bff9f2bb. 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/DK4YA2010305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39511e2b2a767c9c87f8b0c0c374ca8be87a3db79da5be7f3dcfef917138edec. 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/DK4YA2010306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa178d844cdaeb5fc22e9e4c68f00b511d44d64851147401003a2a596e33a7531. 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/DK4YA2010307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76bbe0c7e52e9eb282e5311cb038fb18f0deab22f70bd89f695d85222fc6c19. 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/DK4YA2010308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa790e902490f40018564d7a2d880d4180efb3178c7052df9fb278e43c7876c21. 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/DK4YA2010309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568d05eccb5d64d0280d3e4519ded157d9430e9e4c575f7781796e91440084e3. 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/DK4YA2010310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f8602dcb1376539d10854fe98e130e9e3fadf288a2bda4d4ab1d6e98396db7. 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/DK4YA2010311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcf1d245b60c15c36fe000ff97562dba5fd1f6c508e5f59c88a968e31bd4cf2. 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/QMBZ92285950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643ec0cf50d508f0bf84c27dffc3afec9c2ed404f2396724180c91a64ef2543d. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QMBZ92285952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259f760609a273249a13db33869419e5be1d3376cca0ccd20c954f6702a6b568. 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/QMBZ92285953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d0c024b8ed4611623b7cb2a9494b26c7e13a35d6cb6420b4cce5cffda6837b. 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/QMBZ92285954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5ccc04e2c1740536236d4d7caff663486435ed51e8b6557ac4f1942eb90f78. 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/DKADG2000931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d21ab620abfae34a37df8009f88713dbc074128ac9d88a32087c1397840240a. 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/DK4YA1901701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d970a60f89996083aa98aa3c56bf7896567d22902cb58900d5111bc5ac52e46. 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/DK4YA1809701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2350cb1a5e3ba45c9c7f622262a4004b1dae5f2d83a77aefddeba7329543bbc4. 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/DK4YA1804301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ee728f95367fe58b53752ba5b44c1c35e275ce9c9ef71905807afdbfc36e5d. 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/DK4YA1709501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e853f01737127be5b60fa2577655177f9de5796d5aab278435c2b3068242325. 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/DK4YA1705101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7a96e227ecc682e0d3c69f916952df745894abaf0da958efae5092f81941ed. 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/DK4YA1700701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4516264b35c5a64ab2dd185665006c15e8a526f26e3c9a9b105d345135f00bb. 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/USSM19932318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c189e24c38b62f8d717bbf50c059263006589e842c53ee6891350469e05ba3. 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/TCAGT2351992.