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 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 0x698ae7aac9b6213d23d29367df48c50bd0e54bf3b08d34b54590df3f8c603350. 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/fef11192-bc27-40ed-bb03-36e7c9c4e5d5.json and https://artists.proofprofile.net/proofs/artist/fef11192-bc27-40ed-bb03-36e7c9c4e5d5.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 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 0x7d1a917b69895e54f681bbd0fd4c5c8803e47653c3095e44af2cc373ee4dc19d. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZTRX2430322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef5264cf22e5977646c460b835efe2af0526ca98a143f676dd8bc54d946dbcc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWDE2434008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31675889c80d844e6716961060f1e5eec307c7125ffb64420ebf2619bea849ca. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZWDE2434049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d106d088f41d037124ce4bced2bde04bccfe63c30aed6b8d10b1564c1db82e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZWDE2434011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bf37e8464939713442361597309993c5b9aeb06e32cb4b161052de3ddd7c8f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWDE2434065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291f6417a039309bb81e8879c3be991881a4dd3a9f999ad18875da3e6e5a5af8. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/USLZJ2593912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa146635509b9e284024a7ad0ef4a24fcbb3a222690f11243bedcd0a2b478ae25. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLZJ2593913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676fea7566d4df249bf34ef9cb1fcae5b649bb1461f6d4038825d296310481c1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBRKQ2575468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750c2eaadd1eb00016494896ef3c03a53a9dd03dcffdf13e4b6730c4796415c7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBRKQ2575470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885a5080b8192ae5801eda16918722074d52cb106750f94a64fe7d5a9bc33fa. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USLZJ2593911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291f6417a039309bb81e8879c3be991881a4dd3a9f999ad18875da3e6e5a5af8. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USLZJ2593912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076b95843a62bbe7ac2adc93cdad99865145ca7110996296f8a70653fe7d89f6. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GBRKQ2575477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885a5080b8192ae5801eda16918722074d52cb106750f94a64fe7d5a9bc33fa. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USLZJ2593911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291f6417a039309bb81e8879c3be991881a4dd3a9f999ad18875da3e6e5a5af8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USLZJ2593912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa146635509b9e284024a7ad0ef4a24fcbb3a222690f11243bedcd0a2b478ae25. 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/USLZJ2593913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676fea7566d4df249bf34ef9cb1fcae5b649bb1461f6d4038825d296310481c1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBRKQ2575468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd310f88c7c786f4adb9fa5722918d5ef02a9f09221c8ec2280a5f21dacf12004. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBRKQ2575469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750c2eaadd1eb00016494896ef3c03a53a9dd03dcffdf13e4b6730c4796415c7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBRKQ2575470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751dac7a18e10b881e28a2d6a5b3ba9fce4f6917ebf5b033263f0d413b6c571a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDD2586123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828772090f3dcf2f69fef95002c776e4f67c157b96f011022565868be1d5153. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZWDD2586125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aef5181cb0e646eebaa63e1ddbb7494f1519509a1e1fa3221c7723745392b2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWDD2592420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8ddbcfb1491b5521803462eea4feaf9fce33a338491166d6599758f94a8c83. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ8A2574105.