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 0x40a09558d1b898ec03a3794df9ff384c359b6a0d2b088ee75bc81169b56e9809. 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/514aeb84-710d-42e6-a95f-29d5467e0672.json and https://artists.proofprofile.net/proofs/artist/514aeb84-710d-42e6-a95f-29d5467e0672.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 0xa762448a66af53ea80adee2642f5b9499de6725b2666ab1846a8724a9972d74c. 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/DEU600700858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bd047c9f8a401b2bc5c9e01ba59c11579bb968f1f5107f8bec610a8b336ad2. 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/DEU600701683.
Heart Breakers, Vol. 2 (A Collection of Hard Rock & Metal Ballads)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc50203a0361c407390ad898bc2c1ef8459d65c828208dcd865b36bd86f341a6. 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/DEU601707088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56c73884020cab4f86e36e39993c0eeda3c6032a888e64a133bc8add1a483d. 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/DEU601304785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e527ddcba244cde84a2e4855a45d8649eedee92f3613964a43302a5e9f7e622. 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/DEU601304786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b5c1f25de3cca6709b3cb8cc9c7df98d3a4e9dfd934f22e4bbe7ae21b332ca. 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/DEU601304787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88a6df8dfa57430a1cd88f09c00e1cfc0c5024708c8d70f3b96bcb5899acfad. 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/DEU601304788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430032d5e4389a9add1d60c705d19824661c9d0583b16a6d20c63048d955177. 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/DEU601304793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ff5ef9d87ec369b8ba0a67f2f5646554bb1e4c5b7b8ce9d2470216acba95cb. 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/DEU601003030.
Condemned To Burn / The UK Tour Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16354de392baa11f6a1a4da981d17f15d6f9b0a2c87b8675e1626dad7e7bbc. 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/DEU600700925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee62c2654faec3c488a3c6e3b4069b326ed110a24ed550dc60f39edee235db9a. 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/DEU600700926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f86510abcd738d7d117ceca9c307c12cd835e6c4e4e77931ec6410d764fc99. 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/DEU600700928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cbb588d50cf19b65c02c4bbd43fde0f62d203ec8e65387fc4f8c7217216ab7. 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/DEU600700929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c7f51717885a9d5037507d04c30c8b63c40495294a2ff56baa4a825d97a971. 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/DEU600700930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48421fd62b750ac5377e742226f5766c465cd5c68ce4c0ae2df0d5392276b86d. 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/DEU600700937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc50203a0361c407390ad898bc2c1ef8459d65c828208dcd865b36bd86f341a6. 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/DEU601707088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc823f525afcf2d8bc6402e7bd46f5da34235166b3be69af0cf8f85b10ad31117. 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/DEU601003041.