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 0xab483699e2dc657c3a8fd1616f1b8d7d71841f72910fead9c8b6cf4a99086ecd. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4adeb473-4f22-4b1c-8b7d-70fb0aebe052.json and https://artists.proofprofile.net/proofs/artist/4adeb473-4f22-4b1c-8b7d-70fb0aebe052.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 0xe26c71612872442207b78cc3967302493be326f6a0aeeceb4a82e82b8a2c8466. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:39Z), 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/QZZ7U2449149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17f01350dcbf240c8d803f2acde99f81af1e466536a5362f63f4d6cc65bfa38. 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/QZZ7U2449150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf986df47267069b8381d0ba272c3c8c087a2d2e9f4419d98ee9fa256e3903ec. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7U2449152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa814d54fa1f2a9f6c6f03603d298683e7f2cee3b6fb5f3d506ecc16d2031ec45. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:56:39Z), 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/QZZ7U2449153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59d27de02023fd1e035860fe0ad1602298568e4cacc3574e9ab8edd1d527a90. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN82592938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2401cb9c9d2d15d3acae3f4c6469df95238900f15b5a0f20ceced12052f111df. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:34Z), 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/QZHN82592940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f0de60ea981b5a76bdb4573eb6480676eabf4602a7bf77961621a6bbf79080. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN82592942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4712b6b845789b8c3bd9b96019a833b3ae34ba0be26007d4184a1a7e44754a19. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN82592943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb39409a8516cdf9315dd2f9389a51aff894e2eb1ef75c4b99cd58811f5f082. 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/QZHN82592946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd9fd5bd2e02b1e5110a62aced300135523dae4337e2c233a55b75d7e958d34. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN82592947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7241f4f9d8ad189a12065a0c82e64c14c4d51e02910cef242d10cd6609b33d0d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN82592951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21773a0af3b70789ccb5c5f13a35f65815c08b59734a14e122694dd8f308cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2544060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5afdf1e7f7c6901fdafcc290ae225dd70e641ec3880b116f069666e087939d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6F2544061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609c72fd93e1136184877f5cf01031894ab851cebf88237fc35bee4d44fe1ca8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2544062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062df6b51a81d9576bba9eae1d6bf52846f1a064e4a1621dcee98a122cca2e0. 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/QZK6F2544063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b726367dcab8965f6c240cb76aeb740a001549266ca731a59415ae9b25d8fed. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMER2539422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dc8c52ba6d4775f5fd0fe20b39c1580778a8194082b2205da5254317535e6f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:45Z), 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/QZMER2539423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e05612fe7bad042b1a894cc1726b377b0da43c0409531cbce0078b9f11cb89. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:31:59Z), 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/QZMER2539424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863d9f1d408c3503d97d4085c196193f0ab84ca1bd85f5ed55d184a3f88ab27e. 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/QZMER2539425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b516ef6b5e4da51f590d57cfe0ff6735b8b422eb66fe3f6543a053a00cd5a7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMER2539426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321248d4925c3f0d2c17b0d3f5aca62897d98316b17eb2c6a618f23c22f2c284. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMER2539427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf352b05eefd2a3c906ee6d35ba73e28d032a7cb90bba25d60c998ebf46f4af5d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBC2563100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe098575231975223662df4c5a84bf10243963e9796374cdeca48972485f974d2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:06Z), 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/QZPLR2564404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c5d40669e4d303414fd8a14f1e640c72bc102ecf624c195f86b2040db5173. 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/QT3FB2584813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b89f1c642c61e0998fc730ae64e9a8b24579621e4bdefb631c17cedfd27e8f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:07:28Z), 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/QT3FB2584814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57f1ea04932be137c97a5cba683fd27fc2b22679ef221f15ad680d88337202. 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/QT3FB2584815.