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 0x90c792125390edea8d16c5cd4c49feea6404bb9e1b62dde22ad34c7b465eb6ea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69eb4d67-f55f-45ea-9f69-6348883cebf2.json and https://artists.proofprofile.net/proofs/artist/69eb4d67-f55f-45ea-9f69-6348883cebf2.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 0x1648be789f6469c03fdbdaf2c0d9fbe5c1d83ce445fb7ab230beed60f03dfb1a. 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/QZTAW2474185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88946dcf855aa680d541b9d19f5347eddb4fe3cb8e37afbd434af2aac37bebdf. 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/QZK6K2458290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc669e404dc1cf8e0047c8581dbd4cae30b5bb0401da40459fc188d71ca21fb. 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/QZWFF2357970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5829bca38242c775932b7fd91b13fde58bcf6913ac239f25653be5d20dcc16a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBB2328783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01382b37994c36bd41830bc2bf684c3ae62ed2e45af51183a9d582265af1802. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP42356599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642c71169501c1b550438f98dbc218fb7f76890d4173ef97b9138aa3010b6153. 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/QZMEM2375190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fc477cfd7fccb6955a22c72f4327e690f78c30ceab0fad38363915fdc6df1a. 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/QZES72336037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01381cbbea9ccd5d68fa19893ba5485d10f868f4415fab3a2af4f6bad5c86377. 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/QZFZ42371323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec2ce188b50f7c5781b2b30a3d5b939a72c004ef3038d308e1bcea6f7bc36c1. 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/QZMEM2212697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cb54e0056ce42c8d5e808c93d4f5e5b2e9b83da132784fd63e67e4d903fc59. 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/QZFZ42275595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0e60f3709e58064a103d5be8fcb9c8290c14a5e31c4830ed0e15026caa5629. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAT2167195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b45c912f70cb62a9ff135c071c2399b635e7389040a60b347013d4cc207bc7. 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/QZPLR2191603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf56333764e53a7732fd1090d5edb482f0069d41c3433786dcc4ce47d295171. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZRP42133629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41f78d5531c536f72fd2cc31e9bf06d6b29228d1dee42b4993dc8bcfd564b6f. 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/QZNWU2277156.