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 0x2b809aaf7f2c702c05afe5c8e076dab47b1d42bbb965ad6b0b8fc9a89c19117f. 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/93262e05-c610-4f46-84be-66861ab56146.json and https://artists.proofprofile.net/proofs/artist/93262e05-c610-4f46-84be-66861ab56146.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 0xd789d0273b499bd178dd87e9f5f7a1a33549cf4258afbf40c6317253e59b1edb. 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/PLM402208103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5dc0f750c0bc1bb644cfbd08d148e4faccd6234681ad81ae2e9bd1e68e4157. 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/PLM402208104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12038f5d63559d4eeecb165bc192519b00d10f5901b53c40de71609854f1ca62. 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/PLM402208105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ba68765ecc89a43c2714d2b144fa31e80233d551680f18822957ef5862a155. 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/PLM402208106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c38a6b80fcb669aaa236574bbc6d5b9ed77d0953d5fc68398c5a36429bccbbf. 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/PLM402208107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cda573f32392fa17320e5bd7482e101f9b3e881c3eb5fa26f0c57322cc4722. 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/PLM402208108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cae6e401af78dc5d1c81ce054e51c34dbe9b54bc9f16a2ae75fa025b894e5b. 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/PLM402208109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05f5d6934739e238ede0073ebe7694eb5f934b374a3ca19f0c401dc56da5aa. 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/PLM402208110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e08db0d2b9c99a2049d5598b4ab0bed23cd40bc89ea8a2a3560213982fae73f. 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/PLM402200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1254f1ee28010883b689a79ad1ce61987e020fdc6c01680e28f0cfdb761443a9. 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/PLM402308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4069287791292e955aabb7f6b53c1e088c07b6cf79457f4232ddbfa23aee347e. 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/PLM402400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0348fca214f82301e53d1670e894da70702f81ee930b5c5284cdb1d4c995d886. 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/PLM402407002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87657fdc9d95f99a08b801be8ee8fdd56a0af5f8b1a78fb18552728c4dae553b. 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/PLM402408002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4069287791292e955aabb7f6b53c1e088c07b6cf79457f4232ddbfa23aee347e. 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/PLM402400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7855c8fc57e257a371111142262479971cdb9daf6499648c5ff6f09303a557de. 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/PLM402408005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87657fdc9d95f99a08b801be8ee8fdd56a0af5f8b1a78fb18552728c4dae553b. 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/PLM402408002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5586b21d319c10c3d89f7c1c69060a70e9ace42d48485c6a8620928d5a5706fa. 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/PLM402408006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc23d95584ce93791dd43ba7fdb51d3d1b94f794c841296db48c582f4cf6de8. 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/PLM402408007.