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 0x0e7c7de8238c6b9c96fb995b02f9320fd52c57d8db1ab0d9acb0d7b8d4f8c652. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7147a08f-08e5-4276-93f5-ecf56eb197c7.json and https://artists.proofprofile.net/proofs/artist/7147a08f-08e5-4276-93f5-ecf56eb197c7.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 0xf68596ca6c5ec3d15dbd553ccc0b136ed8b79c4338c11a3b32b90d328906e960. 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/BK4DA2446738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4955b150d5c66ca9fe2cd84e5dc7ce1a0a4acbfdbf34a8f18653bfa9e6610529. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BK4DA2446743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dd0f8bbb0afea06310619869515e77ba2a9ccf9c00399ced93397c1af8944f. 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/BK4DA2446751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be9252b887872fa9c27998a2086bdf765b7442a43fe715458059565b3b4cae. 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/BK4DA2446754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25b525a4fd6b6b63816bf31dd417ea47f27da7330acbd1ec735baac3c093f4b. 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/BK4DA2446755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ea2521481ca6e507bd3240c1053e80268f9e8a24a755bdb7b9e8c88f744d12. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BK4DA2446739.
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 0xd660ca076fd3b4b2801379382cdf1d3f9374db40e32afee0e2afc37e9b7ee9a9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BK4DA2446740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64777d59775db3f9a4047ea7aa8e11cfddb5d3ee34b069c7cfbfed8f8f1947c6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BK4DA2446741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dd441ea09b1d861d89d85a1538ebbe4af88c0519bb95e551fa7632b7c31923. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BK4DA2446742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd112f90d7d2ba8a936673fa8f5fbf63ff8f72e8993c82af9d631b5bd46baaa3c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BK4DA2446744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e5dfb5abfaa4fe9c58ff9431e9ab60b8587cfba3ef1ba06b3a8b7a0ecdde7c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BK4DA2446745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8bb67a25afebbcffb800820a016fed505d8d73ad5f9b9a6bcada8e8713df5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BK4DA2446746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d54bcb0333c61c83d6e855dd604d8a3941344b937a4fc5101a7c77d07cf9aa1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BK4DA2446747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd830c0fae5e790743b24b1112c40e3b2c17de3ca16084ddc1688905cc4f43f75. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BK4DA2446748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cc1b56c35bf4785541e2c361abe6ecbb7990e74a881e9fc9fb8d12e3b89fac. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BK4DA2446749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01ec4ed30008ec5e7426f0a5a619b8f7ba6b0056c4d353efa5ec1f338d01b2c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BK4DA2446750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2be9407325e555af37fcb52554f38659234bcf3d8decaa8a71f24720ded5d2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BK4DA2446753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb733bdd3c26b587189d67594990d78278c18dfc1d943869469be07270e807d9. 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/USUYG1564126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a640c16b469d7f8810464eb779818b894c4e9b5ffadc2cd31897842c497457b. 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/TCAHR2359643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1a7718f824473d97b7e5f7fe15da5d83a6b4c055c1f5d52fa9e64f16c55e9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAHO2363908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a845019ea603d9ca0bbbc633e58d70dd11fa1ee6b954880c11a23e2ea86122. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAHQ2369952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ab663c167d7ba69e4ccc3753fc708fda1e806e5865759d054bf47d7fb67e09. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHL2339869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c31be96b06c91e8dc5834bd6124566947198d3ac4a0ca089c866ebaf65483ab. 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/TCAHL2339875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd232eb41f7c9e74144bff26c1a6d96d713dc082836852c077f68c962ce8ef65e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAHL2339883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec44fe037edde21ac208c3fcf0f0a7004500890548e152cfc61b56c7f73dac42. 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/TCAHU2455375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf58d73e4f4397d55a6710bfc1bcd180ccbabfbabdec06a4766aee35096540. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAHU2455388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09146d93fafc82f18b17dd6ba56a73181e4e04e32614c4ec440cda5093c92bf. 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/TCAHQ2369738.