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 0x69db9369ce9b94bf7932156ff6ba0bc4d3f8064e2654731a28e3731a7c850c2a. 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/e9ee1e8c-3035-45c8-96c0-59a40485f9f4.json and https://artists.proofprofile.net/proofs/artist/e9ee1e8c-3035-45c8-96c0-59a40485f9f4.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 0xfbb49b0cf4198747c90b9c2552ed11c91d62bad27d8341839911b489241be3fd. 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/ES5152100560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabdd5127135a7b807be1220029aad83852a0a5f621c6e7149394f738e4d1abb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152100792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7953ed9dcc3cfa9247a88f20fb4764b6a0fb32275ae29302059376c774c6253. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b10754b76cbf16a6515780b930cd8afba73acf375a1766617ee4cc83c558f6a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5152101207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc712febd4f74d67217c8363a49affbcffaa0f16661fca712640761a7220ca885. 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/ES5152300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5d65183fd5dafebd179fa6e4f90f402cf303204df117ead9279e5a42452efc. 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/ES5152300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5335d90bf4477ab0b8a09e92782cd563066c98ed488d6661ab57263dcd4dcfbe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eec67c1eafa9d2ca7c4134eb5eb7cd821bc4c16b2c0c2cee4e5ca84407e8046. 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/ES5152300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4b478bc56121bb1eff47c02bf5b2b0b645a6db81f5cbf80fca9027df39983b. 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/ES5152201061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72b03a806d414440833803bb7681c30c5d2b5cd010fc0229a44ac4d0d1df2fe. 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/ES5152201763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb515cf3f7b03f489f63694a297c593997ae01da1210eb940e242651c4d93d08c. 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/ES5152200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632f83fe89616f0dc11e31900134e65ef7ce07f2fe15149a553114fd32704d86. 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/ES5152300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc79fc0f80d188ccd8bcdc1804c8cb047fd32e916a651f880c7d915d765402e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5152300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f85b11bc155e3ba12487728d8e2b8ce52b7b688190af245f479645c7cf4951c. 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/ES5152201615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf887ee7e6a276f2cbb3b50e8681619c479bd647f8e978bd793266e1d38fe2276. 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/ES5152200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd6c896af8347be60b4a0aaa381a722c5f411b4d23b7a58f744940b17748b25. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e01cb913e585638e2deffc36437099a4e632095f9cf15dd4a3b7bd49306e66. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5152300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f85b11bc155e3ba12487728d8e2b8ce52b7b688190af245f479645c7cf4951c. 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/ES5152201615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baac924b3c3c89dbfaf7da6e1af0af25cc0cd30c6d5d6f52e8fdbab126103b7. 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/ES35A0800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b10754b76cbf16a6515780b930cd8afba73acf375a1766617ee4cc83c558f6a. 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/ES5152101207.