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 0xa0ce988a8e07cd7334f117f13f08c25a2bc8ea92760da540213645596fc0d0fb. 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/599e1888-99e3-4315-b6b6-f522019f254f.json and https://artists.proofprofile.net/proofs/artist/599e1888-99e3-4315-b6b6-f522019f254f.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 0x593d6a8043236d1e0e5b6c5e7243638a32d32813d255aa819eec80e8c2a75998. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GB8KE2205753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff637fa5f4dfe51fa2ab62b06f60bf8147ef0ab2a86dabeb87aa338488160e8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GB8KE2212406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28089e63280cb4d53a689904d7d6f81ccb6a92f5f2e06813ffac59344232efd9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GB8KE2214304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360aaf96e7dd2b987e17bf2a3428144131a36c562c9eef7cc3102a1c2d996d08. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GB8KE2303566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e131bfb54458f9db2dbc336558cc3bc3779fb7cb3ccf8fe60d154838bfbc63. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GB8KE2304904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e11e840438baf9c664fcdbd25255ad6bde3e3ac05aeeb798e5e0b590aa17076. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GB8KE2311668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dd35900ffa4da564841f2aa1d15a7c2054ed36262ea7a3189ce7cd531feeb9. 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/GB8KE2313241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1305a3460dc4915eae3ce85450a46e98968e0904fecdfa07805a1fa4059a5cd8. 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/GB8KE2324990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e742fed2a8ea9e2ee3227d21949561ce3041d9a3ff32c9cc91754fbbd210c50. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GB8KE2327425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35c4291c0f4bb16c7ff3adf36a66ff91350e319efe9adc55b76f8d04775456. 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/GB8KE2405771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9982054dfc346f080c5c181a43953eea785907f433e8dfcfbf563d3e941beb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8KE2407859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e4ae40904274b9183a36a98c935d6218f0c0f6e11927acaa1212f07733341c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GB8KE2410070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f4299bfac536de1ecf3cd77c0157af6093ea1163f8016506fb19a29b011a9. 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/GB8KE2411132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5683e2456b397fae847171925d2ef865c9892e7ef35d652b3dbb5a601650d2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GB8KE2415700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6848420b9f12d37d1e06abe7f427b1f018aa975c146ef2970c4a83757a1ad46. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GB8KE2416231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4596b07bf70f21c1f9b12456aaa5985b18c095f6291d2c533fdb799a3c2b9f1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GB8KE2418729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b18b1bc6323e2343fa49b07448cf042ca798788c64efb1a5fc2a1b72a4ecf94. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GB8KE2420590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e6e042db9da4133a7da92b2583b2653f0e2c71b29aacc462482af3a26b7333. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GB8KE2420589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f5c386dfea522dc0ee96fdeed35b89aedf7e2267b4f1b01432c2072562a46. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GB8KE2422272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecf7fd316f09b1a6c2ea09520f9b6d313c0ee6faf6c9507f410213b287b03f0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GB8KE2503052.