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 0x1bccdf31cacfdd08d213e184157f0753f940f0a8a416a8a0e2693241579c7794. 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/4afc51ad-2bdd-4d7b-8096-9e628cbd9b97.json and https://artists.proofprofile.net/proofs/artist/4afc51ad-2bdd-4d7b-8096-9e628cbd9b97.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 0x04dd0eab4e0c7d9842a71967477c29502226837e2cc1cf97b52cb890c488b017. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:46:57Z), 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/QZRP42116458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14de323e8e77fba2da88e05d312c5f5976dedbde521f78a3dc1c5f62cee7cc3. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZK6K2208049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5104ef8354d886e9f43de796604444c5d9ecc38ac678fa096a2fa574d054153c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZ5FN2371168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621ead432a9e732ac27ab299957946c8822e2ea2aa08aff41ff3ea9ed25359a8. 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/AUBEC2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a56256222bbddf7ab894cf16bb882e5ea5212a0d5592544d901fa38fb8a4a9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:37Z), 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/QZ5FN2373199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3897e4be03dd346cdbd8eea1ebf409fe5188f31a98fa2b2a261c442d9fc19e. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZ5FN2373191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793d1914a34afb00ccfc92b4a3a432a4bd8feeb898eafb0954e84be54e11dc0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5FN2373252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b814bcee5feb15fe9c6a1403d481306cb6ade6fe76a800c2b7c7c40155dd4f6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:53:41Z), 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/QZDA72215803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cab134e39dded1f93bff0c4f0c791f9dbcf4580e2697a9348b0bed24584205. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ5FN2373131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39beb1f7994f64041d26b9e2a08d85575a9d448f8d895a4e649b11723903b52. 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/AUBEC2310457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d704f890a94b6e7ab523040e870eda409d47df8ccfcab174602011bd18991e. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZ5FN2373123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeea659ab5fd54c7bf25297bf5358c017913b68d7797eaa07511bc7371d4301. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5FN2373118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda97a89c4193fb292894da0267e6c03b92ea63e5c58579e10e5d0886a01d25d2. 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/QZ5FN2376098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aecb061a217f31a07b541a245911295c110e12e414276ca61f0ae374970137. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6QE2412643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c85982615b46950a7c803af2e7c67005032845f65f965c5e8cb2e78879c2805. 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/SE6SA2421974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8fca1b7e3a29aa11304e605bf67b441d674ef493656861278290165e0666b7. 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/CH7812423752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bf64b9a8def463e6e0e94aa2952cae2b135610d24a10d1a17fd1ae5ef1be5b. 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/SE5BU2588965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28b9a347f3c982060504ea354c04764a82c3ebb1a7a9a19e09aebf8d2da7482. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SE5BU2588969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a5bd8c52ca71674cfe53730f89e5c537b2fa5dd94d1cf5b68c41ba045985c2. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE5BU2588970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95314dfb7e35300dc89c00106d4b4e99a2312759767720fb5cc37748c3e83d53. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5BU2588971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097bdf2ad5bddc5ae98ec3968edbfed8410373c6115409b9d72fa22ceb2fa1c0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5BU2588972.