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 0xb5d2572713209b9058a3428bd1fba21b4978cab5947f72c7e952a9ad7a5ab78e. 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/20a30ec1-ec77-48a6-8a4e-8a4812e17086.json and https://artists.proofprofile.net/proofs/artist/20a30ec1-ec77-48a6-8a4e-8a4812e17086.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 0x1b65295b842680da05a19142bef82f1f5ce1453b74f393e61929324b5f9195e1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GX4M32100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f749320920347807f7e02e0147fea751f1690d77f4a482c6c0effc1e08cce18. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBBPB2301211.
The Thought Of Loving You (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f609dcfd6a46030058be6c9ab27feaad7ed3f631eb1f7ebdcbce1fe79cc2a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBBPB2301210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b9bc2958e68306464bfc39d6001145fe7b9700c564c079e20197b6b6c197a0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBBPB2301213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a420a0144672319c67198245a823d07c03a777be7edb83bc998044b167101f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/GBBPB2301215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50643725750c5e4e1fe5ee881c5de7946e781346ef96e9dd25ba828902968728. 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/GBBPB2301216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52276eec27c0f0857da3bb6b46e15afcdc406f3f41c5f99af3fc91361ee63f4f. 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/GBBPB2301217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649518d4b9e15dc2ca32a5cac78708e46d7f3a0061f158af9ed275618b739156. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBBPB2301218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35979024ed6079ed2012de60eff967e117fb4a3355368f9e083d868eb413aec7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GBBPB2403789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f22eaeb9a5a05854de4bdd7544155cd2da5b6c8cd9914899122a0c37394825. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBBPB2403781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaaedbf5b3a7a3dd73f5cc82f5ee1b6eb81516babde2f7de344b29cbd0c120b. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/GBBPB2403782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78b836d1eb29db91dcf162a15d3f9c698c12b171ebb749b0e4b2fe883b3c9f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBBPB2403783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1ce79d881700426a8f4883812cbb63b07609c6c9a3b2019305dbb99ec9ba02. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBBPB2403784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e05a766230c8f5923ae610184448cbc7d1cb666889c8cd30186b4bb6446db5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBBPB2403785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf475c22cd45b74fea652170a5cd548926bb4f182ed8929a3408309d037b0ab1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBBPB2403786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7581ac275d66a7bc37d807a0605dd1cf62c0c453cf6ff2394739daeafb570b46. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBBPB2401457.