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 0xa304c5297a74c689c5f90b709090cc73a89c1ea3b7b202ae0cce846bdd64ef98. 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/221ad220-c41f-4dcb-bb90-588c50ddb1ae.json and https://artists.proofprofile.net/proofs/artist/221ad220-c41f-4dcb-bb90-588c50ddb1ae.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 0x58dd3ae4ec8d7e6c368fcfaf197862af8566d7244e20de9b79346a236ff4c181. 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/IL1471902152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2121819a1bbece02a0f2834c1601913a376a15c36938a9c3c61c75d0d154ea. 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/IL1471902502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb943eac1c8b28d7fa3a9c7534f481c92f6190317f1c8e13a1f9df118ced61ecb. 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/IL5842132836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a3cf5256d754e43ee673e4c4051e4a2d88cb7efaea088b9d14629b56d30040. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:09:27Z), 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/IL5842132958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364c291a962755445e223c9c543ff4f6abe34fa185e743b0b770c53fc62f4014. 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/IL5842132964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccb3ef33ab996dcc99a83df9f42e4e149169294e934c5966fd883ebe509c9f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL7192200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be283ae892d3f4efac6c5b2973443ce4db0b2f07b678ec695ac0be236c31b6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/IL5842551571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a251252707a0b026e0be2f434432c6fa4298dc7ced57f02ca844dea3ccc2c78. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/IL5842551572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e35496565b659b84dd129025b1c79b3f372cf3d3425db104fecb5beeee010. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:49Z), 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/IL5842551573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d775b10ade690f3695065b60d664f3f7559b76dce07bfcc133b144c3ebaa98. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/IL5842551574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11836ab1f63860937e9350086d5db20941d73c4cf05706a81be8a67a8f028034. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/IL5842551575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ba7b986fde50849a8e820fdf0bc7d06f71442fa36d6086e435219efe91227c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IL5842551219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baa131a6cb8ac6057fa474aca1f9691284d8c9219b09a878464ab50d01bc74f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IL5842551578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e12587a4a0dff3178f143eebbdb9b12f5627fdc2048e92f1761c781e7f0e07. 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/IL1022112250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00cac0a61659a82bd963298ce626c184a8735fef288b07e1daced9444341b6. 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/IL6192304426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00cac0a61659a82bd963298ce626c184a8735fef288b07e1daced9444341b6. 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/IL6192304426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075fefbd9bcaeb221b24cd2d591bba3446dcb2096f4676c5bb1bbd92670f6f4f. 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/IL5842134281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beaa8ef24d53237fbc6dedbf0cd39b087ac6cd8d2566fb2f14f65fde303d7f4. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZHN72353452.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf758540169eb7cd7b53dd601238805f958ebb46f7efb97648ce998693f3b5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHN42156218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc165d9331b1ec8bac9f53db417f5cce565d78592c25c4ca79e2aa3de94710d3c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/IL5842236287.