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 0x412aad1935e58736b9296459aa2ed5faebaeaa5ca2fd2611312c54c9df8c7439. 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/d5bc0d74-bacd-48d5-9b07-05ecf53665d6.json and https://artists.proofprofile.net/proofs/artist/d5bc0d74-bacd-48d5-9b07-05ecf53665d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
It Never Mattered Anyway (feat. George Gleeson)
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 0x73e387d4d174ad95fd1f8e1dc263632bd2c7dce14006cb7cf8371ba0a053e159. 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/NLQ8D2102216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f5048864fc2d1320f18e493f53e7f256b3e75b359349d4677e6cbacf04a014. 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/NLQ8D2102218.
Thomas Gold Presents: Fanfare Club Beats
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41912b21d92e543d97836216165cf87ec1c6dc5995d58aabc416de2bf41a48f8. 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/DEWW42000557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c43a6c95b41f95d14dc586727b9f09353cb4ebe603fcd3723dfffdd5bf077b. 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/QZ5FN2432745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10650bf67db2a2b400c0751683e68c3181228ae8595a0ab407d8c0ff8f2ccbc8. 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/NLQ8D2200996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e52da50deb5b4d276602f0ccd9599983c3cfe6459e93616f224cf52e7e491cb. 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/QZP7F2471890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9130ce6c50ee7f9fbe61fd4bf92ecf4a31af17996a78a1798f29850cbe132d. 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/QZP7F2432750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb3283b63a183f1ce85639c05450b3a3f0a4c6aa84d9befb5519f9d477400fc. 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/NLUW22302239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3306f2fcc8fb5c91dee47411ef4b979ce7e5c9e4d26edb3489a6801504fe0769. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLUW22302240.
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 0x9cf1155c5f716f8194a22cc67aae86bbbaa8b2bcc1ef026af72a7f9fb71b753e. 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/NLD682302230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257e7d44f122bf9d6a51d516ff0dc3ea25c98f20c32efeb2af14a372e60f061. 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/DEUD42219812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65814566b31d117e9223958f6622ce7d4ad5d876d8cecc6012cb2ef37d7680f. 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/QZK6L2067253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf728a4c087af85388ac8fd649c2a7b9c884d132f674cd55be1cc5e4b3db58a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLQ8D1900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9638faf6e4ee1db30191be2f3dff3c4da54e44a37079719981c7b6d57875c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR1540438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbff397621213ed60b2595725a9b15a6dad5184e2711d0b1ae9e033202699404. 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/GBRKQ2524018.