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 0xc2fda1de6d1f3ddd102ccc9864d48c6eb38586db3c32f5c0e09fcbbe89082e78. 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/c00d02e8-76a6-4997-a9b2-1a71f4ec22a7.json and https://artists.proofprofile.net/proofs/artist/c00d02e8-76a6-4997-a9b2-1a71f4ec22a7.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 0x2122454e5a50cf524c8f1d852c133a3d163355460150e261fa048a28b1be1851. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7R2496604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c19a12a67bd8a4e0cd26f5f6876a3b7796de20d61f0fe78c1eb2956f72e44. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZZ7R2496605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f821898096db8064857d739b26d18350da72f0486c74f8f33420595cfa69ff. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ7R2496606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb825b5c13234db10b0d21520ee70e9ddd33168e9e070f8647f172224a42ba55f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:22Z), 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/QZZ7R2496608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7458807e956f07e7b1d7dd35b6a2ffb09f13be8c0320cca5f1630fe7f186a2. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:30Z), 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/QZZ7R2496609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187ffbd8aaa9f47d1f4dbdbf3b995f4eae02420dae02e95efecc3e46c9c5428e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7R2496610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942a55ce2b7e73923d45394b363d53aa7050db7f9a8eff892028dd9add5fe4c1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZZ7R2496612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e5980621b6fdf291e1c0f08e1404033e739ecc1fdd746709a63922f6c9db16. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7R2496613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2976cabb52e432eb02c5d734ade1c92983fcd022665712f62616833e8b55237. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7W2473871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665fd39c68ae55d89e6f7a2a26631d0a69e5c07fc92b218bff2bdba341cb96d. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZZ7W2473872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c1309f402bdb3b8d5e9ddc9a4f2a6d1c2909dd2ad19bf224ae20060efa1d96. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZZ7W2473873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f148a3d944289b30b04386021bbfb42b07cfc240f24d69584c5249c16b301ba. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZZ7W2473875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eacc85185c000d95b7d741b474306d4c3750b18b7d8034e5807ea5fb9ba6a3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:14:42Z), 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/QZZ7W2473876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97ad10ffa02caeb71432909e246add15e3dc0cc62fc7f585957bdc5a4ec1a79. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7W2473877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51a1c93ac747702ff859a1028aa416071981a8249d0c4f83c8951b17c967f86. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZZ7W2473878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe84250e63c7067ef2a20bebc6cb875792c94c356430b3069230ef524ba6b7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:15Z), 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/QZZ7W2473879.