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 0x935c104cc55a095c921e39ba32b28057a46ead45bb99c378f8f22f5b777bb69c. 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/2d2271bf-83f0-4ec9-9372-b1f9590d8584.json and https://artists.proofprofile.net/proofs/artist/2d2271bf-83f0-4ec9-9372-b1f9590d8584.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 0x74c2132c42612fe5349424a7adfe965f6394d96be515e99827ba4b73d00fb00a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBMJG2213202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae60c0138e3c51fd8b291408ef379fba6dbd6e94ee712886c2c7d591630ddbf. 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/FI7S52300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3bf3c1d24aea7681f693b36873daf21559178026b5f05ca6eb1693605f9d0. 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/FI7S52300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea87ca52bb6f0f942680d5cee6faa5a2c2009b0f3302195895d9dc94568d01f. 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/FI7S52300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46119bfcf465bdc76da4eec9a6bd8cde49d9a47ba3343c9875f9310e3042ab8e. 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/FI7S52300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bd8f885559f1040ddc11cdf4e92c091ca54cdf6bd213fef7ef5a541647845a. 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/FI7S52300287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22d424b67429d8f5840cbf980a8f51424d21f51d971ee6ea436a28010ce5ccd. 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/FI7S52300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf533dbab4f88c4559497343cb94cadb569bdb5fde1e860e6b1177dfa815506. 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/FI7S52300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8567d7d82dcb302c81e7d0aa1184fdd8c412b8dfe1b8f42297672aa3c9c07b13. 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/FI7S52300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c1495f6b7ea99fd57dad09cc85f10f7c7d47c22f344be00b6f3b5c64254ee8. 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/FI7S52300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c700cd6891dc28529c76ce860cf5693cd94cf9646f1dff5ad53b2b9bc22bc89. 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/QZES91832482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af21427c8662560790ffb83b25f5e2286014c7ce32681888863f50c18a967d. 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/QZES91832483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98119c39be68f7c2d0e36797caf78194fd9b503de14933617089e0371dc44105. 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/QZES91832484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071adbdd1268b69c4c2f5fb2d42328b464467cdca6e14d066881cd462fbc999a. 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/QZES91832485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de67036bdfb8997b283e2d6a5f6ba18e9ecfa563fcb7b52cb5aed82a31c8d79. 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/QZES91832486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ce4eeba01d8b48e099a67e79cde22e4d6baa423cc6370de7ceb878c9594622. 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/QZES91832487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3394858ca6d35376825c88bba33d1cf7d39125d1254cc9f3c9f3bd089a031385. 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/QZES91832488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb6147d4317d3c3f7b1551507e80ba039793c40ae68a5dcdcad4334c6f83a69. 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/QZES91832489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3bf3c1d24aea7681f693b36873daf21559178026b5f05ca6eb1693605f9d0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FI7S52300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22d424b67429d8f5840cbf980a8f51424d21f51d971ee6ea436a28010ce5ccd. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FI7S52300288.