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 0x578181bb7e4c40f75b39faee0cb0343afc2e771ef9cf9d6d842fe7620784bcdb. 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/b3e43bbb-3a73-44c5-9782-6f47f4f9b8f4.json and https://artists.proofprofile.net/proofs/artist/b3e43bbb-3a73-44c5-9782-6f47f4f9b8f4.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 0x6ae2c2e78c8723010f41b84d0d5a64336798a0187a458670ddaa18982110a87b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR10S2018764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c56b81321b9e9bc09769aaefa0d1daad4545c26ad255e9041118ad844adb6. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/IDA651700195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a681428d763511b204b4b50009a73a60eb2ee5ebff4ef4e439a66ca39a6e66. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:57:07Z), 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/FRX282155388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25ec53feec872b809c1e37ab33ce867b0aa2d7d0a482a91d131ec26ba3d843. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYZ2275740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb81d66e5e3d25784b0f2aa194dfd86a6e441c062dcdfe3a8763fd4aecdf3026. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/DGA072439539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99790013ae648591fe2aa75246d54ac12257d1943e527f11c50dc4b08669b01. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DGA0S2435319.
4EVER (Alva Gracia, Ridho Hernandez Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604dcd77353e325251d890e733469bb6dcc386b9c3d2adbb6c510de1763ce71. 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/USA2P2517716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25ec53feec872b809c1e37ab33ce867b0aa2d7d0a482a91d131ec26ba3d843. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2275740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20189623b5f4a838a8f8ee8c80e23a26730b40afe983b13b5c1c35b5882e88c. 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/QZRP52183635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb81d66e5e3d25784b0f2aa194dfd86a6e441c062dcdfe3a8763fd4aecdf3026. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DGA072439539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138c366b50f1887b3d207a8053d59aa15d805230b0c434522e5a7d96d409def. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRX202586658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e323c9d4759951a069949f7bb2dd82965a508f9ce44d2d17dcc23fcd6ebcf9b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FRX202586664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673622c81bfd393a0e0ff626088c7bffea473ce80d8f90030b85ac53bf4cc6b0. 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/CAHQJ2117332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900102cb0b77ef3a9ae4c78e700f7a81fb3c28ece1ffbde0f15095ff8d42b314. 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/CAHQJ2117337.