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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea0588b2956c3e365b219a192a47a6e66a69cc51c8082a3849f8cf901812fc. 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/866465cc-bac1-443d-87d3-53ef4043e471.json and https://artists.proofprofile.net/proofs/artist/866465cc-bac1-443d-87d3-53ef4043e471.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba26a495d86ca1f9a8c60ba0de9aa51d5385b3d87c7823f86e31ba5c0625c8b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKVYY2400772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c043c0a31ac4d822ec155d5feef6eaf07223d68f91d81faf033563be2f358bc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USANG2451535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c802b3be8253fb2007ca6ff80558ca5f00059baf2a857cbc19aaae23eb968. 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/AEA3A2301592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fddd87fc35f5547adf6fdd9d4436422aa593e42775273732841306c5aef899. 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/MXA3V2411407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc4243ce85e38ac1e528510b4cda85a8a32ac5079cef06040105cd34d55bec6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM3DF2405294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0668ec20c28adccce72ada49f08923b8256cf87b49eae31d2cf09a76de10ca. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM3DF2405297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e68fefc46a3106e0fa0d0586dc3f4db82a2ab66170ec447990119be82c392e8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM3DF2405295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28099347a2385e37c4dd478fff411e8250d1aeb448a2b88f81818b4a554c3fc3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM3DF2405298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5679cd5254d806224a445c10c56b52da4a7d5315a3f28d7704c92c3e208498. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2504590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024d1d73867bb75c8dac054e624a3fa27dc92f04e7207b280776f90f612a2d9b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF2527313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69623547ea1eb3339f7dc1f7e4ccd0559eecc9e340617c8e15a2a84abb3d3fc7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:15Z), 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/US3DF2531138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91e51e00b3954b9e654b6b13794bb8643a430befd491dc66ce5820b5bee3d4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX762502479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2aa8d81709ce966d6a2c16efe685ccdd71b40a887c5b363fe4d82211ee6320. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:27Z), 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/BKVYY2501754.