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 0xc8b1b4dc8b73189b6bbec631839adbc8fb64c8d3bcd24b18ba3d5ea4cf687c5e. 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/89d1279f-557b-4f6c-b830-066c18a35b14.json and https://artists.proofprofile.net/proofs/artist/89d1279f-557b-4f6c-b830-066c18a35b14.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 0xeb1682bc6d93345381b4c89a94a03cc1d0e0cc803c395129f778c07967997100. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDY42125599.
Bulerías (Medio Lento) - Compás de Estudio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a9f68278cd64a9ff9515503e84d02e2b5d80a60bc3fef8836a24616b39f2b6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USDY42125600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93d4ab61946bc7279d2c3fbf53bf899c97bd56f39c7d93ef99cf9bf6600e8f3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USDY42125601.
Bulerías (Medio Rápido) - Compás de Estudio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fa81641640f0b43effcfb0930b90fa0734c95c5ed41b4366a927a4da3b24e5. 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/USDY42125602.
Bulerías a 12 (Medio Lento) - Compás de Estudio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2fd51be5e3132be5b560a6d6c88e3e20509ee7ccb13ed7bbac2cc6861df950. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USDY42125605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d66bde0390c2d570821098cd35cab4425dc3a2900ec0001ba00a08b1fc5a183. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USDY42125609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc640dc58ebd2997a090bc4e3f17f0a6f6bb898507c5c69a225505c3815003ca. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USDY42125610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd73513dd1259c73c6768a938855afe65c9d0b0d0a87709198da8b3bb137c390. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USDY42125611.
Soleá por Bulerías (Lento) - Compás de Estudio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc64c034519eb381eb7e39ea8cd1a1d2f50cb8b0f92a2bb000d2a4e8ffec83f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDY42125615.
Soleá por Bulerías (Medio) - Compás de Estudio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1786be6acd0c4db95dffa048a0958ceab761570c218bf1b1290ac5a134dfd32. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDY42125617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90350cf8fa2019ab5ce9fd66604dde8c615018ee684c162cf3d2d732537e50b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDY42125620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88450aec6e0d6b3e07b0be156d9ee29c3dd7f3b772ea4eef6e1804f2e1e32d4d. 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/ES71G2306095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd418284fd87721a56a618b54a33c6be01a6a37a28a82e9d20da5ffefade2e878. 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/ES71G2306090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa3981e9bd945fe459149ab56bd743189987b9d97bcbd6d3c89578f19c4873d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2245445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff7c3f9373908d7f86b7b160d3eff5086897f532eb187fb1f675cc1d152b412. 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/ES71G2306444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60661e5e9b5370c6c63fd85eeab108ead2000c3c621fba189add09a0817da95a. 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/ES71G2306092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb566f1427cdbafa71de7c40e619c96b528e67b89127fee145ea91c72ca1306ab. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G2306089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae0fdac6ea68eba5fbc009d450450aad142fcf4188d84237605ec2b51e8e2e. 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/ES71G2306096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa3981e9bd945fe459149ab56bd743189987b9d97bcbd6d3c89578f19c4873d. 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/ES71G2245445.