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 0x2f9caef52c8fadea15a98d26118bdbe313624c545960ebcf25752a0ba14d66bd. 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/b698b9f0-aa9c-4531-928a-50ba66b985a8.json and https://artists.proofprofile.net/proofs/artist/b698b9f0-aa9c-4531-928a-50ba66b985a8.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 0xa54fa2d4fa528c880c299bf9501db2b46fd1d8dc061dbd35f18040130b1044cd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA560783563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2706936f71df357d53b24007ce0f92ecde21913f6808ad2609c2ba2e0035b89. 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/USA560783564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611af0a8a426d71b6002ea8e6d998c71638d5710623a6a03d9b2eeab091876a5. 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/USA560783574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce70e595114190b689dba2d846fdefe0460f1e7c829241227ac4b9379650f3e. 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/DEZ901501780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae64d56da42bdcc0c85bca5d3bbd55f9cfaa83ade3a604f3189a83d8c366be2b. 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/DEZ901501781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc931347ce45d1245c43d5615f234d2c71dc9fb4d416aa258ce58be1b91647. 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/DEZ901501782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c9b39e2a8a729f33849e9fa3c6ef7a32c37cb9527b922845318304a7998084. 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/DEZ901501787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5310333b845cc877b88fc27fc177f0c45fc94f911bd73a5a3437ce2d5053891d. 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/DEZ901501789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd1e8c4aa38df6a7946a210e590cdbd0885009d554feb6db6610d14d38668f8. 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/DEZ901501791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df5b8938dad319dc06e80353711494dd95e46715d783f90927962c13fca6922. 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/DEZ901501755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a388677bfc3ec6f1b72b507bc893fe6654acdede021facf2847e29f19b91bbc. 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/DEZ901501756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952cb8eea0989683d46717fae8a06f0952c757b6e91b345759594026765ab90e. 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/DEZ901501757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966c945dc5029b6d3fef554ff30bffd8f8eaa19ae2afa7e52621149bc153e660. 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/DEZ901501758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda396b5a74df74bc1db7b6569981c8ab149a00204b5cedb53adab4c080040ed4. 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/DEZ901501759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d25a4926a55f7891a04eff0a094c450548d97e973649370a775a1dc9662cf. 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/DEZ901501760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f1d213b87efd863824699d1a97ec897e8f45fb84689b820e9dc87810ca9833. 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/DEZ901501761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56916884d17a60b3a474b2a1b74ae0ad806ec1daa9fcfbb4dbcac5827dcb50d6. 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/DEZ901501762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b1bc03872afc99f07cd1fb7827851f2fb1064b68d5af86f2b1aad46ee62c90. 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/DEZ901501763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf464c5db3f8d549e81811502255cac89ed4c8a8a988a51efc806078e12f9082d. 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/DEZ901501764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5e9dea71dc5155e7a4f15b2e4a4f3a96ff3ebc16fad244b504ed0ff68354b3. 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/DEZ901501765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72332126495282a647854b3d5a7a22fa4561fb7d6b821f163774f656c302318f. 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/DEZ901501766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a52c11852dbb7da678594e6bbda24296e344e27ae8d89c68038bc20cfc8438. 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/DEZ901501767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbc8a240456e02df9f916e3aa94d880d708c8cd8ef01a2f074048cc2b177067. 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/DEZ901501768.
Stabat Mater: Stabat Mater dolorosa - Remastered 2015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662785b39862fa670fe1b834dd8cd14c047ea2aa2e71a2076decd99005c24ada. 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/DEZ901501771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b6f2e125ef72b71decc823fdf801904dffcb6fc2b9806b4fb0c0e44cd94034. 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/USA560947351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f81cb3a23fba4566ac1042f9b670ba7d8d3f3963bc7607f3e85a4eeae4a0ba1. 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/USA560947362.