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 0xac54139e4ca8a172a354508b36510f087c6f11a5945977117865f184d46813a3. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d847d834-3bcf-46fa-a52b-86177944efad.json and https://artists.proofprofile.net/proofs/artist/d847d834-3bcf-46fa-a52b-86177944efad.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 0xda83c264e43c54660be4ca93141bc144529d80dbddf1f659d4093c665e3e9b03. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:42Z), 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/QM3DF2401538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39321b5df080001a304d7a62e00ec6d5173643a3bad9c942ed567c86c9b17387. 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/QM3DF2401607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b10712b412aa43f12c18d3fd78001d2333af22c4c5990f2c3ad2f611c457f46. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USANG2488407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ff81757388a3d92dbd459d6ebfe91b4a75a1216a5fa7c560e49018232758e5. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:28:18Z), 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/USANG2488452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb341219423b5894bfa590338b2ed91a02696db579a9ef17a6d5ad8b369c118d2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:19:55Z), 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/USANG2488454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eed099b0c76b1bfdcadc6c00b289e54ae0f9cbd36eff9c4c4311968ba66462b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USANG2488457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa957a50fbbf7417f2b21ce20b526345aba259600771ec2e3bc1ef131c771c921. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:09:33Z), 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/BRAPI0100635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757ce73d8433b744841c477036eb5a92ec811fae08d5df4805e6beaddb9c0e4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:20Z), 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/USANG2190264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5c72e73e0b4b161db13b8fbeed43b6cb88d8a9530006d40335170e5fc0d909. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2060888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf963e4b81043df3ca9997f8817bd36b4033f10dcacb6ed48ffeb875dfeb32461. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USANG2060956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106c02a819d8630757425f2beb608b9866c1d55e4187e9c0d604572cabff9c60. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USANG2060977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f97c2294ae32fe088d88ce4284ae913323f103dba3de3ab75f32e1f16b1666. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2061022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d013ad0852594bf5d4ff17c92094e9b1a13e630b264f95bd27629ba76f9c9. 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/US3DF2525333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e33ca59699c404e86bf886d78488d9e7c8722ca28b2ded6c671c6307d6e665a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXZI21800017.