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 0x7bdae7d62117fb48fe925cdb8dd8d9958501e60c3f7c6c45bcb481d6cdc1a121. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b82fd37-a076-4f4d-9e84-b255648f84ff.json and https://artists.proofprofile.net/proofs/artist/9b82fd37-a076-4f4d-9e84-b255648f84ff.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 0xdcb6b5d03732ca56802503acec228812060ca7412b743b7d4b9567a0af7fc8b1. 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/ES71G2050777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ce39199eac8f9941f13681255b15601baecf51cce9a59eafdad0f276bc878a. 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/USA561068932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3395c46c086ba9be77c59fc25b03011492e3da527c254b23f40dac1300084b. 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/USA561068936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7e86ab355c5168a30137640fe45575038d46b4d2bc3b9b6ed48365d924f8ba. 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/USA561068950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bec1de3e0c72690f666914d858da151d39ac606b81d16978876718ccd22640a. 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/USA561069142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd51bcc3e8ceb785bad7e406a4fb57f4f0165f091a8a8ba0cea35cddabae7c7. 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/USA561069144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c19a9468cc5ae2e2437278c78bc71a128cf699b6e7c36b8475f612e6a8eb880. 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/USA561069155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e7d6bb2ffa94f3ca97ccb5ed3885438d6573e7615719dc5a81246658efd3e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USA561069023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d08c04e6d6ae60c96bd508096946992135a8e1d1bda18f7c3a7f9b6b4d4e40. 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/USA561069024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd178a38c5c60c81e46567f62336d95b9143a67a05ec755eb1aabc9c34113a271. 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/USA561068968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c92181c781c71d8897d6c537f9e77f010bad769d68bdb72635f2df87b989d0d. 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/USA561068974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4862153f948c7819a9f8ccd59c9e4dfcab6c59f20e559de25b6dd5405a61fdf4. 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/USA561068983.
Aquellos Éxitos, Vol. 1 - Edición Aniversaria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e5433858d34f24d14fad65aaac9714c620c3ccf8940567e756234a353516f. 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/USA561068953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52211583627b1ca2ba576927b5c39e58f1f9ba8bafd87fb9da1aa296ab7d7526. 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/USA561069097.
Canciones de Chelique| 16 Grandes Éxitos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89b0ac5fe7c62fe7036091e75bb78c7b056ae4ba2951f3f881bb4ee31a3f623. 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/ES71G2309407.
Aquellos Éxitos, Vol. 2 - Edición Aniversaria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f776f65af2d9ff8df343d841f8d3f2f0a1f2e7e6b08a3f7565b51491a7aceb. 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/USA561068987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680cb39b96c4e5212d17573187a2a3e7e0b46eee285788c73c5859421cf06117. 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/USA561068989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc737ef011c7159e9f38e0cccc5b73bb60371d22a56a0c04d4bb1765fffd0fb. 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/USA561068992.