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 0xe24616cbc6b1bd903293121e230715388635e5fe9cde8d6467900b1c8696fbfb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff248e34-e5f1-4f35-abba-8334c94851ae.json and https://artists.proofprofile.net/proofs/artist/ff248e34-e5f1-4f35-abba-8334c94851ae.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 0x373f63d0e5f2275421437fa2a12f5679dab93408d2ec6d6ee1b028ec4022981c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USA2Z2100942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473ab751ecba2c86aa18a17da3b0281f4d686257e560cac951c389caa9faf815. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA2Z2200582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3b7f032509c0ebc12116fbd0098840a057bfe261415a8e805480270b083be. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:09Z), 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/USA2Z2200583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e691f9672d465a1cdf51be4370243cc31d3bf15f953fe987846755c96405760. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2Z2200585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbd6561ad6bf61b064de531d58ae52c02083891c30e2373d5417038bc27ec44. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:47:26Z), 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/USA2Z2200587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11bc93297b43ff026c5f98adaa55b7c90ced320946763d45757e9e34141bbcd. 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/USA2Z2200588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c2cbc221b80c7a26a8f7b710d4abfac9c3014136360fc7a7b4baf70aa89ad3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:20:38Z), 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/USA2Z2200589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5abc6c33b077795c29529dbf249a4a7ea1b5a803cb86855754f4143c1e540c7. 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/USA2Z2200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f75beefdb9c7242ea90ebd74e647377763b4b63cb7d062391f60afb8111f5d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA2Z2300494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b03b8238aa12f5ad31176f90612203fa425c73e3f6c67f18fabe9c859e28e8. 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/USA2Z2300495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccf6901275b1ce02dcdfc72669cef34b32018d253a1534d43c0aab5ddc86000. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:27:41Z), 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/USA2Z2300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc40825e87f96dcef00bdf2294cae498cc3b24e405a826b00011070a59266e0. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:09Z), 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/USA2Z2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb465ed0aa9c1f876dff69786ad7653891e7f0efa2962d17a5cdcf0d69538456b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:05:09Z), 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/USA2Z2300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5911dd7f9155edd3f264ecbe1698a31bd4f64830908803d33fcb190bc2a2b19. 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/USA2Z2300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6e6aa2cbe47f6fd1f58eaab517a9371b8bec3027a14fb6a40ff4d60a4abae0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA2Z2300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0151057cc09968b98fb9c2523689ff9f3626b196b9bf92dda1ec4ae5cd62d1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USA2Z2300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382696c4314c01a3159640ff20cea2dd6277c8ee1f67b1f348f95ef624cf682f. 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/USA2Z2300506.