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 0x2356dc039f5f27411dabf12c8a85ad93cbd84f4a91879709a37f3b9b7cf269f9. 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/d622b66b-f617-4e0a-9f65-4a10920c4f32.json and https://artists.proofprofile.net/proofs/artist/d622b66b-f617-4e0a-9f65-4a10920c4f32.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 0xbf16037109d2ad29d578b8f813c28f207d45ffdebedc14c6b66cebc08971ad93. 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/BXQZW2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457e4f821ce019571aea8ca3add8fee3d3e6c36d6937c715024ba94ed8f4242. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXQZW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb8bb871e25f8b5977a7ff7dae384fab56319caacac66c23190a09ad38590ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXQZW2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6357e3a08f7728f6a2f16ed7aa75c5d979a886db6ad68a9e8faf2b3c9058f5eb. 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/BXQZW2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c207f10dec0174c54d616a8c3f9a3ba6c3e50c953f3b0d88c612018f91a9a7. 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/BXQZW2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b7efa60de03de68fa7f56fcd8ab4f6d526d7ab9b7e0d7d1a9f1e41a5947d6. 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/BXQZW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c072ea35e2bc648625a5af2a55c7c6f3d7ef4b7d98bdf71a1ab34b74fb4098. 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/QZMZ92492769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2970e4e6d7ed984626b057099af6cfaa6bfb59f468eaa0cfc0a747ddf3e8a1. 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/BXQZW2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d6691e1a89ea1d3813a32b53013c50b86a9cac4f3f13f4bba238418091713. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXQZW2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b1b3c645a63d194b316a0cc297eaae780a9b2374247cdd5e6b07ec87d9ce4. 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/BXQZW2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b7efa60de03de68fa7f56fcd8ab4f6d526d7ab9b7e0d7d1a9f1e41a5947d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXQZW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c045d4b8ece9fad5860e36c1c1425b7b61f3c17014960a801573f60483f183e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXQZW2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e9220a271d2e066cf22f7d5d410f57186a0e39531525405b1a4f24bfba3a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXQZW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f232764135dff03f6736c3c18ed23d7a6fe77e927e49cdb36626d8989a3d640. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXQZW2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ab81863d71e5475abffb63b10802abf4b0894f25215d653419b1ae9bdd7f9. 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/BXQZW2200018.
ERREJOTACULTDRILL, Vol. 2 - Esquema Novo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc4380c4b598064c73001765577e8d06a71f0ee7abf3759d336177d53bdfb9f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXQZW2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc64a9bc5b24eb416761d1462f600ed4927aef236284be37ab9c279e9ee14201. 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/BXQZW2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cce4dde9efb30f44936b203c89ef69e1b4b9f9bcc214e4d877e588dd7b9f5d. 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/BXQZW2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf473c1e9470224055e1ba02c07b359d006d71e2bee309e2e87e363549ddff947. 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/BXQZW2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49f240fbbb10f3ac7580d771d7a4a3f81cb9f8761fbc8b4b569d90572b6aaab. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:58:56Z), 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/BXQZW2400018.
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