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 0xcd21da3e6c4b12e5a426df6b32924a3c024e1f329a0903181abcf4575a22ff42. 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/6d62bec8-a4db-46ab-b8b8-58873716737f.json and https://artists.proofprofile.net/proofs/artist/6d62bec8-a4db-46ab-b8b8-58873716737f.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 0x629c5d3c98d9470832785cef0a4d58e36c8057eee87fcbfde50d44c12d609926. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZDA41831922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb32dabe82cc5505ae4b09b499eec1e07da75d667b36194299c9114d06746e5. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/QZES71807116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a99171a1cac2ede573cba157dc88cb64b3edcf02384944c37d8be02c57f665. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZES61920436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f0e8493eccacb666b6939353be18cc643a642118cf725a31efed214a56ac2f. 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/QZHN51961972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b26571fb66e49fb9d8622afa86869aaa74226f24dd4a718255cefe7a664638e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZDA42032622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a10ffaf928f26ac488af172a2d3ec4f677bd6c9f0817058ebe8d729ec08b7ec. 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/QZK6N2098124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc11aca0baf728233460e46d5204181b06ad991f8cb8990ed9390cc4114440e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6N2098127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7dfda18fa4349c54e07b79860a794e9e11a4f7ea014fb9c0ecd15e243d5b37. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZK6N2098132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dafb057209c8920783c8fe12b89c6681fe383d363c5fa121fa6589e077afa8. 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/FR59R2294584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a77bb8c4b653f437edb0bdbc16a9fe76fa8be2c3a128c6cb42a13a018d1155e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR59R2294585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69df9232d87b2e905f99088a5fef0b2c8860e1377ae852925e84c64cf669e6e2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR59R2294587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3f9abaf3683b4fe4fd974f55a794f22790987b6405ee1220d96dfd1986eaf6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWX2201865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb447875ccdb9c530908e6c0138b467e59817689ce52c2881e3571f83cf5c49. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFYZ2391154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47bb91e0f8f4c8d851337a1a5661f5f09486ccf24035e0b80f8b9f0cc60bf4a. 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/CBE5X2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f547ebeb82d458c40732432b3701fedc01d866e88348fd01e9f4c3eb4a5238. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CBE5X2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd658d8708b7067c9909498c6dd653b4a80fbc788704c4bba9aeac6110f195199. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CBE5X2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d19ba966e62e17f9cbf3ecd7a20ce7a40952320e18421c012e448d50647f7. 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/CBE5X2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d52a9b386019da10542a91d30a59594449f5d95d75b191c83ec558dd7b5e7d3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CBE5X2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b25e94fe119fed755069236113dd31f022efb282a1be63574c45b77d694165. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CBE5X2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1a806144ba3acd6f28178d3dac69a60c98a8190110d44c93ae3e734675a9e5. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/CBE5X2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47bb91e0f8f4c8d851337a1a5661f5f09486ccf24035e0b80f8b9f0cc60bf4a. 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/CBE5X2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18973853acaa7c729fdcf39d6b5757d460da7016c401e4ab86f4f432d614800. 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/CBE5X2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd658d8708b7067c9909498c6dd653b4a80fbc788704c4bba9aeac6110f195199. 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/CBE5X2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c996e3a6fd0a7673346c670fb1ba5606da43cb600da33abf4047be441261f5a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CBE5X2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f547ebeb82d458c40732432b3701fedc01d866e88348fd01e9f4c3eb4a5238. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CBE5X2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f62d251550b58c7f64ccaedf8f3a3f2630a105fe14c30df293d00d8435a505. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CBE5X2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb9d4b5b27a6bca9300d211b7a925c7fed5becea31185d11a6b285d14bd62e7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CBE5X2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97da78af400f9fa2c13e8d7e24321399a8dbcbc0496fb8c912816ee6954c795a. 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/CBE5X2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a1dac0e106d65f2cbf8b128bf99d7fdb966af41d16cc307ac3ec64a8c542f5. 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/CBE5X2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee5d870b25313abd6c91fa73178a83c0c245924bc5a679eabc894cc1b9a4586. 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/CBE5X2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d73b9d4f8a7b9bb2c458e69eb558ccf5e759e3df1f0511ac1086512cb9d1de. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CBE5X2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8148753f2d414435b24959352ad0537a1021e462806bbcad41038ec71bb43ce1. 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/FRX762245851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef92939eef1402ddd36e186f3d5d6fb3c61bf026c136b51180c8a40be91ccb0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAC0C2100621.