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 0xbbc00dff1ab8c61fe229453264f2071d711ebecd349fe8d6cda85b8d9cd819cf. 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/f0e23ea0-62e5-4428-8427-b3059fa8d3b8.json and https://artists.proofprofile.net/proofs/artist/f0e23ea0-62e5-4428-8427-b3059fa8d3b8.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 0x6eb0c8cf48b9f24d049af9695a389fb6fb8f1461a02ac7302b673ef9b5cf1dde. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/PLC061100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138c38b93047b18375139d58f71903798768bf3c8d84496a97a1af2194fa9850. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLC061100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb292fba2df711537d423a2dac1a0f30da9d0ebf44c96ffa65e21d1d1e8686964. 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/PLC061100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43974d8f3858808f056c8e1ebd7af5c031fae9e7dee38f5f904ca0c1809ba25c. 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/PLC061100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1bfc6808950ed4513aa7f27348c5352545755674f4ef70de78d227ed9b031a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLC061100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72697b2c8bbf28d348f7d6a4862e8835f38ec1717bc696067f6a23802fba23b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:31Z), 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/PLC061100614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd70d2dba1f439fbcc614ef91b5b4b82635efab4cf47a32621220533332b151e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:42:23Z), 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/PLC061100615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11061755d1666310bed56cbce8dd32c55aefa3e3e06948b11bc122f2b0e35964. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLC061100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b4c1fea2f1e510adb9b133cab7cde5adba0a678e93593dddda236710a3200. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/PLC061907913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08345bafa21a9d262423290f26a7172387036cbba99e97dda1b083a0f5ac27c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:48:57Z), 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/PLC061907927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be68c2e462efa381de07612bbe9ec48ecc3e0fe29121e9525cb8531f8387909. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/PLC061907931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523fbcdde7a07dd8a7e62eb7414c891e974d50c169bbc2d288b9d4cbd4d2faf4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PLC062514520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf62fd936d411c27175b06f2afb7e4358d3da8483824661d0f5bcbc21e7a4015. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLC062521028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39fb0349c098c8908333a4a9f9ab50eabf874610b98b77a19eb5bf55d6dfeaf. 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/PLC062120096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39fb0349c098c8908333a4a9f9ab50eabf874610b98b77a19eb5bf55d6dfeaf. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/PLC062120096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8af160e0810542987dc7e6a2adea21f941348486ddb19fd19caf55821abcd0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC061806427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6345dba0445aa591b8ed50dd2c0474b052a18bdd55134cac17208dfdc531c5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC592200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb9704e78437076cee25a8402e669c1ca8b7dd2bfa68d202a3f2965e6096ee8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLC061706064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77979f7905cbe4672192de789ad640626d78ca3e1370480ba4205a62c53bf44d. 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/PLC061706065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02051e934e3d05cac6f2b7f942ed3a2e3033d76403ff5feb6a3379a5422c58e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PLC061706062.
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 0xde5806f377166bf492fc872725b1d2bc97239cb7ab726411c807f4bc20aba820. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PLC061706067.