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 0xe5208081b6d6b78e2cbfefbb768649dde459ad46ca470265837920bf7d88f976. 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/70112503-431e-428f-b4c6-4c4d98279b6c.json and https://artists.proofprofile.net/proofs/artist/70112503-431e-428f-b4c6-4c4d98279b6c.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 0xbccc56c5131d6104143546a5222bfffb589548ca8d216d7cdeaa26e7497f0ec5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX202447174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebddea4ae1fcde722ccddd6e63e2b215d3e2eac0363e6de0cf6f2e9642c20fd6. 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/FRX452476665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bed8b3464e074981a16b8b37ac4e2aff63c8c2c07e7ae105597f779c66de41. 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/FRX202415544.
Hino - Te Lucis Ante Terminum, Versiculo Custo Di Nos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5ec30844add53103f356c031d6cd5897dd48194261e66b4b3a22320e6fd0a3. 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/USHM22208502.
Salva - Nos Com O Teu Cantico - Nunc Dimittis, Bençao Noctem Quietam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7cea7b177fafb2a87fd3a3fb0e1fd582b6e614ac8532b30c156234f7e139c. 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/USHM22208503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666fa5cbb457d7ae3755b85498d91cd42380fd499ede23d3ecbfaea8b6db4e17. 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/USHM22208504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dd2a2c6cbd399ba8becb05613a79d91c1a65f521ba29061eedf5c751c03102. 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/USHM22208505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68812043c64cd3f90d581ebbd0f1f9c9a7ec33c0784c9384aa51ec55774db7e0. 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/USHM22208506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd400a4d6c1ceadca1cd8eaf2f4a37b68354db5d14196f43955b890c77f4f79. 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/USHM22208507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd741fe64d385151a65f232006ae5ffe69c088b048ab91f26009443d7e170ddf0. 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/USHM22208508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bf09c10b1531473ff5c08da6a9c19f88b416bf61cb5fada7401f9e6255a53e. 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/USHM22208509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096cde874d185cfdceb39f3b3950e0e13f31c87bef935082154c09d1ee878988. 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/USHM22208510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58baf555d183db9f97f840676de82c042027ca83cfcddcf61a17e74f88932671. 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/USHM22208511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b185a3dd33bbaea2efb6150bb58c05c7f2f2d2ebe9a9a28772e4a22af44d26a. 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/USHM22208512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcca505ecee06ab00899bd9b211cf86df4ed6de3a9e3bb9892de060166399e63. 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/USHM22208513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c58f203b3c35e81f8421168064519b0f6c4b4a549ecf4177a516fab8aff7a3. 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/USHM22208514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a655a5d93c07adda5a877729b117d0520b3515dedfadd04fb5430e3ea7695ba. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USHM22208515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f94bb8cdb1b94960545782359644cdd04861acd7e1ef2fa0b566c5d67e846ef. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/USHM22208516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9569a07c343cf12c96c9e30b11b1f8b0710154f561c9c4fde20d7dd99c7a64. 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/USHM22208517.
Verbum Caro Factum Est Quem Aethera Et Terra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be76b1ebaee7f6fab8ab7208e41404ca1e2ba59ef824956e1e0393296da6d8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM22208518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ffe49d9ccc4df45a418b9390a9e3e67e242e997aef1018caf9aa74b734bfae. 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/FR10S2431632.