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 0xec031a05c15606098d53f4c1119e39c7365d8ee52a942c21665adef17cb49d1d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3931d05-a93d-4222-9a31-bc732d50f5c7.json and https://artists.proofprofile.net/proofs/artist/d3931d05-a93d-4222-9a31-bc732d50f5c7.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 0xfb8da62968079150d76365177e87f32faadd6b3b49c51e8a529c302fad8b33de. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE5BU1758146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0296fd5c9ca19dab23e0e33d4e361621eec78678b899883c92d43403d3a01d63. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:52Z), 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/SE5BU1721241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59f495972990f551e33a2cd4ed1198a4e71a1797ce7a8f3fc7091081765d767. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE5751862627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74faa9323e56cbb15457307549b840e73006005a27461eea950752974ab0a316. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/SE6HN2001457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4577a1d2a3014e46dd56e74e25bb307c45505b2a11f8a79cc5eccf4a348053. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6HN2155705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645d0658e734f26138791c24de2c6555828e9470a3df7881e4faf9bb2d8ad6ec. 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/SE6QE2118093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c77d8a570b8b0629e63477899f9594358dbc004f63935f85c1793eb1e14f88e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:30Z), 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/SE6I32231768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf645885718274969a7bc34eda5e599858bc66c410ef4c390b8d9aa46910c3ee8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE6QE2274262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7a9e29bf16813d361aa39ec93b359ee72a14e45929560002249457564e82f2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE6XY2279964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf13ac08589bdebf2c15d646691b19f32c4f7c66e3f80449c2b8f985adc08ae9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:36Z), 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/SE66N2239777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74ce6be0c8b29306da69994d9c63a64668d66a8dc618d683e58ec152388d9a3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6HN2376405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa12d12cbdf938709f2fa12e51b0ea52c38988250f7cc98a643e29dc982e3ccc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5BU2485474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7670c585becbc18c04f9d7b3528d6a1ff343b307dac8fa98a96fce2c0739fc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE6I32420426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8005b8ed04e574a4f607a89dae59b4025ffdb865aa80c864af568cefd1a6a7e7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJB2456156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0becd4982237dffc75e6621d4ef5b02bb967504e3661933d14e8a49abc808ee. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:30Z), 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/TCAJI2516049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72ca44813325cf6fd3c7fdd0f4033c678f376884e3f46c30cf13a2a12c48759. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:29Z), 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/TCAJQ2549033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2ee879c7f479494ece30f39e845f8fc00e38e652e1b055f264ea1411a5a299. 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/TCAJQ2551247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a5268405248220a6db5b29d0815ba4b1fa8b5ac5b81d76966a86de74ba7293. 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/TCAJQ2569900.