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 0xe1fe06a45464be000d53a15b011e905e2ab0c3528a2aa522c040402313f45814. 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/29d7bd37-c9e6-48a3-b5a4-7622d3113826.json and https://artists.proofprofile.net/proofs/artist/29d7bd37-c9e6-48a3-b5a4-7622d3113826.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 0xb7687f28bca750824286d3fef77d1e26d0496aec1004f31bc33421a615c0fc77. 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/US2BB1300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd435722fa6750f01f9dc4064fd66c4b71486093b4a382fd762330b2cf0947bd6. 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/US2BB1300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc2c9988ea318ea9f511c24445cef60daa9f3037a1c7b0b6ed3b0d7aa17c95c. 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/US2BB1300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f1d4991019eecf581257cfef11405f71f72ee478b0911eaf2d965ac082c52c. 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/US2BB1300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe423c45595e709dba3647c423fd78eada10f0fd4a19e4be05154dacf3c1974a8. 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/US2BB1300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fcf49ee091ac82841fdd00a29e510c283edaa367ed893186eca0aebbc93d9c. 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/US2BB1300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959916f9f5ca6ef023a78a43dc927f3a37db38a11ae3b7d93c3700c0d17dfc16. 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/US2BB1300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132c6d6bede56d7da04091051fed1fc92ca5be3230487a55191132c035270d5e. 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/US2BB1300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5927426254c89e1b64ac8630534b7ea76feeddccfadeb715ecbcadaed827cd70. 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/US2BB1300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9c2919e1a2508113cdff59f47f57b6dd34d2a545973ba5e19f0b7b7936972a. 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/US2BB1300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e92222e162d13e1c81cb0f3681e46c1af328789c734475ff300944fa7ffb6b4. 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/US2BB1300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bee31d32350f0a36a08733377dad58e52fdb603c737ca58eedf64621ae5b78. 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/US2BB1300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48872ed14ceff451882b91b8b5305c69f42d0ae70ef1cb3156fd3f2afa52afe7. 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/US2BB1300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4255cb1bb03f26c0c01d331a658941a0fca3ad241af78e23b87bff0e99bf29e. 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/US2BB1300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc8bc98810a30170d72757f75eaa5fba7170d7fc8c9a178545313fa43a6f534. 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/US2BB1300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7151a0e8fca783d79b4350c08341e1e4be634f8b90c607a8e67e986a472a3b74. 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/US2BB1300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa4e2e8b4ff57fde37bfa3a716632711d328fb304367a5bd1ec264739a689b. 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/US2BB1300135.