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 0xbb87109beb7854618adb6976f3d750c82658fd214ea0af5451902a372d4472b5. 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/eafcda93-f182-4654-b882-095d74a4848c.json and https://artists.proofprofile.net/proofs/artist/eafcda93-f182-4654-b882-095d74a4848c.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 0x30e860dbd09d67b88aaa8c64d6c090f235b451a2c3cbfd3c34422d6251a59c5a. 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/PTOA11900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f018330d24e9bae92080d036d23febf10985b560c55b55177cef10bd74aec. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/PTOA11900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1110350260bc40bbe904953cea06ee148bb5fa7fd3f91838a92cc80e9a3920d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/PTOA11000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9c3a3af52041b34c555b9a166eafc9d74ff0281e190850c0989b517b6eecc8. 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/PTOA11000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92299c410f438192f47e22563a84a3e13596a532653ad8d0b14ca33236ca4e8. 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/PTOA11000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0419fa6d3c1afdd80add62919ddb627f94b79de9ec1f7f874be7183240b5cdff. 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/FR6V80512402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41e29e688470b79acac6f4317c9f3be9d1e4f2b7dc7cfd34124b8bdc433274. 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/FR6V80512403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fe87ff087fff40b49fd792fc4db707f383aa26bc39d9811c92cda78814be88. 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/FR6V80512404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39efcc95062fb717eb61a8a0b33773ec5e484bd609b52f4fb589db5d32f20141. 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/FR6V80512405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4657564c220430b8743843cc168a6d2e95dbc890b2d1626fc7ac0bc0c59075da. 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/FR6V80512406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5489ab9be7351d2a8b4cfaae4acb6ae83842eab843f850d10a94032333aaedb. 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/FR6V80512408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3a4370427f58c24c49f4f9719852163cbfe7ae5f966cd7863f105ab728b9e. 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/FR6V80512409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f0f8fa5bbdd5770a6b26c50fd5498989375d3e3bb895379567efc946877bda. 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/FR6V80512410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aae94d3dc6435f97221ed843d8e24558cf907f429317d37649ed21e8339ce1c. 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/FR6V80512411.
La Partida (Instrumental) (Valsa Chilena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1653daa39605bfdf8cdaa0c85ad2d4dd238d54c44cb93ad825b412185231683. 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/PT2GS1700021.