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 0x9f66abe7e2f9600d175ccb8ccb0ea308e85350999a28e9612eaaad143cbbb464. 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/70e99d71-754c-4c70-816d-96be56ac931f.json and https://artists.proofprofile.net/proofs/artist/70e99d71-754c-4c70-816d-96be56ac931f.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 0xbe55ed0b78b04041390c87207be0fe3ae70780f2b52f9d2cd9f6b88063a23720. 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/BRSME1801957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f72d37efc235f0d00051c18b8904e361c07f8a33fa0ebeff7cdf115ad424ea6. 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/BRSME1901147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d214228cbc9e2b89f3815b243b8dd54bca706f9ad4cbbdb97808394152d8c. 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/BRSME1801800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4737bf0d8cfe7288d927ae4bcfadfb9df441bc9623b40e026d77ffa9156213e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BRSME1901146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18575513fad519797d84abf55b8ee80c29a4fbbb9ff5af4fe381b82b890023c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAGOO2131027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09b7c6fab173696f7364b473ede7434c4c15187ad3c1a009d225dae3fd41673. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAGOO2144616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb3693dba9ebe25336a97229b0001936c22bb79ed20004cadd3c7d4e7d580ca. 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/BCKMU2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6116fd95da6a633605995c5d5d4058e4d7f05c0631b7869ca18f029131565. 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/BCKMU2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ce1ad264f4147dd16a51ae8f7625206ea8ae054a67a807862ec51e3042b71b. 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/BCKMU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4861fa4c0500514881e8689e57209a87015d19205851edbfc3c26960e7a8ee0c. 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/BCKMU2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411b45c8c450e064bfc6e0cba37bd518f81039b1a66c78c40f8cad4267b50fb3. 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/BCKMU2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d5bfcff0b5388b55c326800bf4871f660bbf9f92eb22b8137829f0dc2466aa. 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/BCKMU2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f161d6289af3d4cc403082ca8c4993aedd6d537840be1ad8659fae873aaaa77. 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/BCKMU2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd0f7b91179428218179f8655df186944e618ebe848e462e1e322d1a75a2760. 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/BCKMU2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42de162c185a8d19941068f1f27d92413c71b4b46676dc0a6cb2855ef5a47aab. 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/BCKMU2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c7cf0775d2e7c39e1d5fd093cc7517035d908a489a441272efaa1800aae14e. 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/BCKMU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fecc6f29b914fea7f49d9d5f8f59357aede96fac429d274e155a048ddfd8c7. 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/BCKMU2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf12db384f66bb36927a5b90c75a1c41fed9b0cd8d154fea56afc28474e717ad. 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/BCKMU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce3c4365d58726dd6e28023e244bd5ab7aef36fd2374a786a3cce71a345a219. 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/BCKMU2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65e075d92e98aa0caeb7824453fcd7cdc7b6ae712fef72639f01ad29cb884b. 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/BRSME1801839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf12db384f66bb36927a5b90c75a1c41fed9b0cd8d154fea56afc28474e717ad. 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/BCKMU2400004.