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 0xbfb62956f7bf0ab71b4c40758f1c30a881a1a81457f03f5311e8548c330cb329. 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/c732f329-b352-4ec4-a491-c71bc3af1451.json and https://artists.proofprofile.net/proofs/artist/c732f329-b352-4ec4-a491-c71bc3af1451.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 0x2045ca6e413c323e7a69eac7cf18f56a0a15738ebce6bd88bc46867bfea59a1a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZQMB2107798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2045ca6e413c323e7a69eac7cf18f56a0a15738ebce6bd88bc46867bfea59a1a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZQMB2107798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59ce18f52d11fc540ff5d56da3952cb7f0b479f8bf0ef6580d513ef3b4f92d6. 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/QZQMB2107818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7c269e5cf9810f0573b4c608de3febce178cd7d37ad799ca90d8f032540b9. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZQMB2107964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7829c151fc3c4ba719e44afd3b5ede0e37e795a91a401003c28ec7c0cc388133. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZQMB2107965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4107c5deed947d9cc9f563618bd1202e04fe56ac9c71ab46516f18ed0271b4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZQMB2107967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa706f70839945dffa7986d37f3a9a2cf71d4137d3c221b1347fb4ea14f3a8f5a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZQMB2107971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd1231a055cb6bc8e4ac4bb7bc8f17eea5ec10dfa78d33208a2657c0a82b189. 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/QZDQH2429402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda69c27011636868677cb2f0050d636a8b5841b7decc64ee985ecfa446819b. 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/QZQMB2108130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1f3ed5ae14aa3429368c6d1c9f17f2ef314e7d5a25c16a0e08dd025db2da62. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZQMB2108219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe121c6988c430147a9d16d6bcfc41619b09b626fc6015a58a981fdbfb9d473f0. 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/QZQMB2108269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda69c27011636868677cb2f0050d636a8b5841b7decc64ee985ecfa446819b. 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/QZQMB2108130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58400bf6d8b28d76cf102f8920f6df8a58201c7a384cff96d713b16205550746. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZQMB2108267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e15d767149b211dce4e8ea25e0fd0150cbf5d91e2706e6fbcb3ffa6420aa61. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZQMB2108280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d19279819b848326d3b701fcc9b311a880a44be251e304c18e264d0e58e5fc. 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/QZQMB2108281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd9bf44dcba95f8184438460f872d89b6198ae608576e6df3a70400d62ca933. 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/QZQMB2108282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1f3ed5ae14aa3429368c6d1c9f17f2ef314e7d5a25c16a0e08dd025db2da62. 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/QZQMB2108219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a60cd641205f819789edffba82760bf0478da7271d5f10ab0513047a5c18677. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZQMB2108283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf399cf576512b57bf206c9eb3374f556a9a767c948433fae510dcbc9c1e9db44. 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/QZQMB2108209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce98c2c2059600810ac6abee23045d2c22abfe1ea223c77cc742f8a5c771a86. 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/QZQMB2108284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0447ca722c7c5a155327948d68f1c46efd7bd41d1964907f6bb38dde113739a9. 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/QZQMB2108285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8537f3266d8ce663fcb5384341b3ff938f4455783e27567e36140da44328a1. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZQMB2108286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde848426cf84c894258643443111806595f29a4ee9589255b88b43e064be66bf. 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/QZQMB2108287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f4ff70a5bb59b0194ad838302986e8a00a0c90a61d614ee17ab62cda69c7f9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZQMB2108288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f07a62408bdc648bc8d22489a5e56742a48a4e54bf357820f64d422b5b614a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZQMB2108330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9bedb13705e149ec4ace4d7256ce6c17b49fd61bb413b6acfbab1815919f10. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZQMB2108580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8a29630ceb8e1328d209b33aba5b6f6ab826e3bb0a9c546e3bd9e0c84c17c6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/MXF152501767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee7b27556fca9bf7c138b4c81aa549880d66edbc73eb6833d74be9f308bc9c4. 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/USUM72414473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27f12841b311bbe28895a8010986567dd961c50d326a620be36afdba86a6e77. 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/QZYYM2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea12ac858abb4c8380e0c9037c306d07580da10871588889774b699236fa5f9c. 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/MXUM72402369.