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 0xb2d73f2bfcc183c157d7df1daaea4922f2cce60c418b66cb5c514173102cb7f5. 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/6d565e15-1611-4e12-a364-1df716e52a88.json and https://artists.proofprofile.net/proofs/artist/6d565e15-1611-4e12-a364-1df716e52a88.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 0x3259472513f16c2904295d60d13b6f4e42bdb7a03df7656d3f840bf96ff52325. 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/INS661000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dd531d736adc51ee7dd3aa3cf189ed1e38d7d84c97a53b2ac7faf34a7c3636. 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/INS661000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30872b3021a27b38f833f56f5001ec52d9b67476ebaaaad47edd1bd06faa3ac6. 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/INS661000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4437c8d9d3bba39b2b5fe6408b1635d3ca5d7a3ddf818826d584b1b32fb20d28. 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/INS661000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22332d6dea09ad9d6372ff0a9412847fb47edbe9c3cddf24cfaed25a97aef656. 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/INS661000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e6e86ae410b60f4099f9971f68d190a1031571d85a00b6c5a530a721682b7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ING211002885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c22ae357dcf8884ac0a866c0ba7445c782ceb087f8d1ebd6d7979f1ebb814. 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/INS651007025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc31b4b10aeb3a8538f776f0c12c0e503ddbf6dabd1987c72f23db86e050b3bc. 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/INS651005136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec858314782f42e6efc8baf3a234733ff44072b8ccbdce64456ef3d37dd34f8. 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/INS651005146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dff8b696000585fa7dac71375a482c88c59a6640b31404667ed4bc1391f607. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/INS651005176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f97a48252bc12d6605fd3a1cdc8ee9a88e64c919dba7d26215a678d4e8ac66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INS651007507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf1e10c6dd3324063cfd6b74149e34de9cfc37482a0314134b03556c3c97f7b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/INS651005776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc733e3143c129879023231f5279739e6d36d4ee7a116d52ea642c424b71b4aa4. 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/INS651005780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff8dc048ad77e1106fb12d363548126552afe702f361f8bab6bb3e4748651c3. 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/INS651005779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a6c7d8aed7be423af530b909bc581bebedf6a5fe9f8cbae8f0c5512bd0b368. 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/INS651005775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c54eb31710f22e3e68556f0ccdce5f1e55104ee98c6246c2d16090e6ea6837. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/INS651005777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291acd5336dc8ea00c8babee59316c5086b03342afc6479f1451b11d4e567447. 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/INS651004864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a38739cebab258b30ab7cd55b0c52a79b790f2710db6ab2aece42f8146f12. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/INS651004724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7e17719fae5a71498dbaf2c5b1369770acdc3a1a30f7a1a7fd1008fb05a83b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/INS651004709.