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 0x4419c608344d7f8ba011bd78c180ee18197e38d13a4516360673c23c1123cc03. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab8266f8-5546-4f0a-8a73-6d941bd8e28d.json and https://artists.proofprofile.net/proofs/artist/ab8266f8-5546-4f0a-8a73-6d941bd8e28d.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 0x3fec9f832f8b0ea7c83d7058a84d80d8a2df818ed6f2b380a6bcfb9275f998b1. 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/QZTB42333479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f8295e6f27e992f0baa8742b5ade8e9c184bc4682d56f94d6eb7b584c5c288. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:43:20Z), 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/QZTB42333480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92881f4370d721c6892bd758dbb45d8867758bee5d6af21dd0ba9a070684cdc4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:57:19Z), 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/QZTB42333481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb824ad67bb67ad98b259532718b2cd5e5ecbdd1f9c6267fc3707d043bb669. 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/QZTB42333482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e5e18ff805d67154e4a337af86407b1815e3ccedd099c618ff72ca19976628. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZTB42333483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c738c84fec9b16b456388ae56bed930d7a627d6d86878afbbc52a8cb1e5879a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:18:27Z), 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/QZTB42333484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca453578591230e337513bb9d843c12a985f13c3e7092f444f8dc93eac00424. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:16Z), 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/QZTB42333485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c816b6a1f1706e54b486d43cafa73e843d04ab0db0ebcc81ebd768e3e6154. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:03:55Z), 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/QZTB42333490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcec5a61839e1ec41df5bd092365caf949ba385cd2cc59c7eaaff4b23597959e. 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/QZTB42333489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53ec3f16b656ee5391c80bf1eb5f87891c1975c87fcee1b26b6c9a3eb0d0747. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTB42333488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b90d4f48082636400f91d2fd2aa6666e3a7f216cc044a4fe682e708d7b455dd. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:13Z), 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/QZTB42333491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4486a1621be37094dfdab728d75038a146ee4e47167b23ebdddd8db69b5464. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:57:44Z), 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/QZTB42333487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cc2f30f056edf8a30da5b07ead34ad42a4846e05bb2ff515dfee46e7abe3cf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB42333486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ba750840654a081064c4737121280375fa02a0976bac7432379a15bd899346. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTB42346199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb447e967f0550c436a2d300097b1026489bddc101df48b1f55ed71e7a3a2ab. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB42346201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1accbcec77c1f8f022b2f6681f824bac86cb47d9a02f4de4fa96c87108787ece. 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/QZTB42346203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0726d7fd260f494c59bd74c82cf88cff09bb2647066d7206709fcf19c357482f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:26:46Z), 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/QZTB42346205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f521e3c9cfc3275adb6e8a62294ce20f21361a8c814704b096de9fc17b769da. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:16Z), 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/QZTB42346207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4566673a60c4c7c84df62a27b9f89167f32bc68693937d322946a57eee6a6470. 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/QZTB42346206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b95c48cc5ead36c2ec1593bff60199e10b8e5b89f625d3f30abe4901c2a56cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB42346204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4379e177930cc86983e86dd6d1835cc9daa1b4d41e3f1a07cf77294fdf89a70e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:17Z), 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/QZTB42346202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677af694e010cfecfa1ba6f48b2bc480bc09563d773681dca5d7ff4cb2e9953f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEPI82441543.