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 0x63892cf4639620919bb5062adc36b38359c75fdc361618467bdee9fa4d55a9a5. 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/bc1bde2c-ef73-431f-a38e-23f5d2ce75ed.json and https://artists.proofprofile.net/proofs/artist/bc1bde2c-ef73-431f-a38e-23f5d2ce75ed.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 0xae35052fd72481d5d36569de5edbc233479ec21e97e66d801d67f50e9e6ea883. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:32:26Z), 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/GB8KE2152594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067a658325b4aaf857060e2fa678c1e6424022259b7c71e32034190a0896debe. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:45:18Z), 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/GB8KE2158443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae547c9c32ab8ce8a13613395ad9d3c8e49a26996e50eefa03ced4ea1c89068b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH7812237712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c52d7057e8e7b7275d1475856f772259c80cda9a5190f68c170bbb6833a8c0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB8KE2326749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256018ab604c8ba14a9b48ad1d1d96d09372f57128d085e6cc7238d4dfa2d4b8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GB8KE2328499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbe66318454ea18b35b9577ebbfa68212598e41dbf0a9deffe3a28a98c45f1d. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/GB8KE2328763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b52863119975fae63a7ae6eb96bb1904484d30c26660da0f3694b6fa228e1. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GB8KE2411699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f3a73752a18579b0e3ad619daea689c5882b50db92ff8125a1b7f270bfc893. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:21:23Z), 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/GBKQU2467737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb04be812e318e7c1b191132eec87917b6b1450933b6f6f28968621af78ca48b. 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/GB8KE2418588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9dd4c716b825a4a08dfb7caf2e1d556178de548595ce1d811ff2ea0fb61056. 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/GB8KE2424186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84aca8adc71a993e81c18a1753e3a79a7a3ef9fcf32a5d4dc2948a6e9df193cb. 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/GBRKQ2048996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d185edf466b40672096e2b5009d6c38412b16305dbf8ac993be295e45bbc50. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7282403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7658e2b90eedfd56aa012a8cf818090bf42bf9083f0f2fc5dd40e382d32270. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N22467360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4450c0b57b9448c25d0bd71e80dae7b060623ebe9f871573148cdd967a8deff. 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/QM4TX2402676.