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 0xc561147dc9bb9c8bf1c8a57a5e275b9a2434939f549dd23a3c670ea9a82af02c. 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/6f5fefc6-8d33-4cb6-9c1f-46c56f0c5657.json and https://artists.proofprofile.net/proofs/artist/6f5fefc6-8d33-4cb6-9c1f-46c56f0c5657.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 0x6f07e95f1d053a3c78ffc7a56b25f646d8cc0a196ce46e529250f122ae70110e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FIHOG1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96805be2b449b1de9237395c503a5542cafa6333c857717200e33cf08081e55. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FIHOG1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a5df7c5241fa66ec2643c3acd04333af200126fb153713659d4c74b91749d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FIHOG1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fa6ea42a92806af9d5bbf148903cee6b78397cb2c2bb95ce934e101cd556b9. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/FIHOG1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f022e443f14120cf1e34d7964f162117ee87641ce09babbef32e8fde5b2469f. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/FIHOG1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0416ff4f03bf148aa2072821cbbe12d665ea794a32419023ee1f30572b64e4e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FIHOG1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8573ad6c0d3054e316bc86156168cc17e9cbfe34d5e3beda66528ef846369f39. 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/FIUM71900466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2d126b5668a229aff56e90f61042fd9c82f67115140fe6808040d52b15b124. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FIUM72000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3abfff51bc8dec3a670bad6c91a30b2f8adda8da6d1bfa5ffe9ba340933618. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIUM72000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f11d9634c16eea0dcc2c84793ce5687e4b0557372972c28c037caad88f8013f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FIUM72000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3251313251e89058face0868daffff0d7696aca5e381d84e3afa7befa13ed6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FIUM72000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba87e15fd49d264e935116ed775d17fcdad3b24b9035fd217b317bac9dfffa0. 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/FIUM72000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34b352be08ee4a3817bb7be551fbb1b489231f7dbab935cafff462491bda7be. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FIUM72000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f10a12e37fe293234fbae072c6038c0ccd6e32de99e0fa122b2f83827a92e. 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/FIKLW2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b7130f1f54f1ebf77a37f6ef38ca54ed80fbc6cdc51931b64f268efe026b09. 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/FIKLW2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c2338ff9b87b513461d42746e9cb1ddaeea4eaa213e1d906bde86cbfed734. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FIUM72100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409542aaf269932d31d0558ff2f4dab5028c1cc9102c712a03d6083bd0cf47ad. 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/FIUM72200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ed60de9fa1e349ce165e4bdeba474a49954a56d86c287781b611e5242d4e6f. 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/FIUM72100341.