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 0xea0549410ffbd0c6fb59739ca0f1014fcb339ae5e70b097ad5395acd9ccd0fe3. 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/d2d6c221-6106-4313-8189-5ba78f0c0ff6.json and https://artists.proofprofile.net/proofs/artist/d2d6c221-6106-4313-8189-5ba78f0c0ff6.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 0x3a8f4869bb0e7f52c66a9ffc325f40d3e061c7a04f2c9d71b7762bc9c3b9945d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:21:29Z), 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/USHM21545090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb8c147137ecad9bae4197b950f9e01c8652d5879732ce8c6ee6d2761c04eb9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USHM21545095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0494aae1044fa18a2a77e94048d7b9c99f3e08da7f644950667ab420c5557. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:41:01Z), 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/USCGH1657748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7524ba7e2fe0a86d2cf81d2f3c5a72f46e93edccf4d07cdbceddebdb26f90cf8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USCGJ1608600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65469e124b0c3f7cb8b7c2e932cba849552d1d2b186d6797907415d82fc2c475. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:15Z), 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/USCGJ1607427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074257d0b256ace9d04a83c1383e93a3fc9895e1faed8039bd124177832f6cb5. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USDY41605911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2551e174538efa9d3cc0e03a1acce738b6e2d9e790af067b4a2f1411dc029b5f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USDY41614485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dff7a8eb5494b31bf0594749b7de2a6a7834d2609a95d11fb1330690ab4a61. 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/USDY41614484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa179ff579a9cc6cd1efc7f2a6f468f19c40cd1dae6cd4ac06f1c2a8277fcf16b. 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/USDY41622600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108bef150ca7d7af015dfbf147a2f944ae14a69a3e3e681b1fc0aa89d8757f0a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:51Z), 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/USHM81626368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d36daec177033c8c1d5ef08c3e922a92e1e94097c7b99593750e35fbc2f3230. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:42:49Z), 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/USHM91607111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0807af500d21eaeeb29ddc48ce7b5d933df8dfd2b4e747ef791244e94137178f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USCGH1730451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04d99902ed85bf2ebd158f2ba1d04fe04d5d76a2942f555722d25b4c3120f54. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USCGH1737994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e928fb4363046f80a6d1086da0eae5868ee3ced92b01c2c404d6d904c8f749e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USDY41758529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07066fab3046f05f8836aa94f1ce9a562b97ec1b6923c85584a8a0bf12eafd4e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM92009477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b87b49dc47463dd976d32a0ef664b3edd8ecedf0109468840350d59c794afd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USHM22113832.