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 0x7f1708da7c98787fc802bcaa502d4f680994805ea0f7eadd9cd38c7f25d41f6b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9a06b99-6504-4203-b18b-55ac6d238132.json and https://artists.proofprofile.net/proofs/artist/a9a06b99-6504-4203-b18b-55ac6d238132.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 0x30289eca24e2c501ecc033950f85d302edd2118d80071bb21cbbe04ceafc21dd. 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/USA560696208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f21ae653e7a5e19032beabd288d22835a961aba7320b168761e08edd1f3f84f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA560696209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d456227c6d4f737d466f9b865ba58869b5c844b66ed875b5ea55a8f4d5499c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA560696210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a4c105facaab62ddc72c5e7cd5c7716a1b34f59e2be2e2edf8b3b16dd5166. 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/USA560696211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931adc23fff6f33f9a328abef6d4347b74823d6d6c48f1a75531e327f8be85a9. 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/USA560696212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ae3892823d0bdb3fd98d401b9e37ba1ed9c972b025a87ae2546fab3f6556e1. 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/USA560696213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512e96d44da46569efe3eb06fcd1791fd4180af154f895ec8cfd6852c964b2d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA560696214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae44169dac193ca1fc25f1cc10913dacb6a6701e6d0e2551a85068d1e87f13c1. 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/USA560696215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4af0d778bd764da22855681e11d525a0bf047ead606de62e9f18e73eca4a6a. 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/USA560696216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaf5590ac5d0804f4d548eaeae527ae114643a150f6e2f91e5c4460bf708809. 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/USA560696217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b0341509651c49c7a7fb6f8b0ea35855aa9953a9371f56810d259ff0ae48ed. 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/USA560696218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb889e690a003e19ec957cb043a20789573bc60cb6f3b0ab3f22f65db49042a. 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/USA560696219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf3a981bdc73d4066777631cb42453c69e89d14afb638b394dd227ca7bd89d3. 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/USA560696220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873d93dd9344fe15dba7c71c8c6b9be905945b74e24537a3737f227c8a83556f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA560696263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3c0bf20957afcc70e4b516ebecf0d4f235df7aa26e8de7cba7ab543920d785. 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/USA560696267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666989fec9e5aa66087f91d5ea022d28f48169ddbdaa3ec10eb4f0112a4db877. 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/ARF470400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff11c32fe762b9caffb64cad782551cc9777acc2a7e855fe2259a80d41778333. 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/ARF470600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02768ca23af2dabb001a513c36bf1181a1377bda26d57e6aae81bb86bb4e072f. 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/ARF470100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666989fec9e5aa66087f91d5ea022d28f48169ddbdaa3ec10eb4f0112a4db877. 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/ARF470400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae568b25c93cdcedde448f02773dcc0f08506a6a0172f22671f5651b6c4344c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARF470100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f31aea47ca9e5ef0e44535b299bc3a48b5b02a1adf1340d7b4f858aa6e55b3. 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/ARF470100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02768ca23af2dabb001a513c36bf1181a1377bda26d57e6aae81bb86bb4e072f. 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/ARF470100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02768ca23af2dabb001a513c36bf1181a1377bda26d57e6aae81bb86bb4e072f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARF470100008.