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 0x3640659201751f115d4d388e881b39c5297442e00ec13932c12f38df8f1054a5. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c0f0fa9-cd03-4735-a08b-3f817b3bfd4e.json and https://artists.proofprofile.net/proofs/artist/1c0f0fa9-cd03-4735-a08b-3f817b3bfd4e.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 0xc8113501543206ce9bd9d0016318fd359e3756fcb5bc32d51c7907bef8925843. 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/QZPLR2338884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517dc50945283eb025d608f047f87f8f6a5ba05750cf34123abf6743a46d6390. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GXD7G2463327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4bf6c9e6f8096fe5005c27b6c9a46845d2f35383f15e0f70b85fd64181a257. 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/SE5BU2528098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f0bcc93ccb74aadc0261af7ea89f986f98c0d473c6727bd323005b991e1e37. 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/QZES72423404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ab8c09dd05a9937c3fb3ab4171da113b7a6f3512ca6b0b3e30037f15966a9. 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/QZES72423406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f27f8dbe62b0a68ecc785ebbb03b53ac55c57836fb82247f4f15b77f5ce38. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES72423408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7150633f5cc66b5ecc3796d688bdaa71589c10a443c6398891704a0dea4fe41b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES72423411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81147f7efd4acf80e0378e9016541d88bf70d8aa0995b7a0a8313a000c738f3. 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/QZES72423412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f50112f990f6b97f6f64b6e96e1a343372953713c923f1e8bafe27ed16e4c. 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/QZES72423413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcae5036035f873a18cdf552ae5bc10d61a09e8b1b17ba75f50b3f85be31bbc. 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/QZES72423415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168cc60d5ec1dd294705c71c16d65a8cf366a41280bb3f5224701c35342ac04b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES72423417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c2e441f653d7e97ab1892e81a582b3a8a01ca23f5ff95b27551109e8d03fab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES72423419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2f64b13c1aa2d9d27e5188e8104b7464204404cae0016f707ec644a265e408. 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/QZES72423423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e500a266a023b9a0f8684c4f6b59b3ac0d4bb24a86b3c45467aeac9ff8e76a. 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/QZES72423424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ef46d8bbb93073234f68b4255570dfa71d3a65b263b9e2a5dfb1f45d80e943. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:49Z), 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/QZES72423422.
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