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 0x37ec2e303239f2832651dff2e5f411b2d12645b5483431afdd441c02723ce1a6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f6fb5dc-a9e3-4427-b2bc-a3446b73e5a1.json and https://artists.proofprofile.net/proofs/artist/1f6fb5dc-a9e3-4427-b2bc-a3446b73e5a1.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 0xb8993d942c65d930017b03dd1d8cbb4bec1722ec128f86393f01a89ade657f59. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLS761700535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0878e8798eec8d089bc13da1d8166b6427c584f9cbe493adc300e4712b2c3d00. 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/NLQ8D1800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bede5f034ed22e17bad55bfdbea00c2c067f4aa789b755b455f74101e36ff7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLS761900473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26894212a854ddd3bce70e87243baafd98c2aa8503d9dd8e1b73877400b8e82. 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/NLS761901351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff535ffd6e213451ec9c3a3bd535ce6aaf73b9274b0dcf577fff1b008b70a2d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLS762000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c810b171ea42a1772ba7f9c66623cdb3fafec97eb10b52bdf3b3b447507f79. 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/NLS762000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7911ee1fc80941841db4c67d8f8f9d7ebd46cb984f145d9b49bd9ecce3d62a. 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/NLH2L2000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5da60262a6fd0d63f7e2cccca7bac7e41d0e92cb3206c47227328580e51dc. 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/FR2X42172697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a376eabf63ef90732f3266d0841ab913212f2052983d8eaf21ec08242117e50. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:01:01Z), 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/NLH2L2200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41775f52091ba45d50a95ac9fd2037312e35b1630da1451ff75de3a831329a3. 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/NLH2L2200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590bef679967a6f41f67463a5725714e6983b8e388bad5de8d7a0aa903c178e9. 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/NLH2L2200490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb389993db36a2e83ff3baf55c5d127732a54613e793d45a2e9db998b24cd03. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:04Z), 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/NLH2L2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d358c75e41887f91b511e78116fe63eeb18c9382927b81c96d526d82a09e1f9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLH2L2300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3250501666d52c62daa3ba2e689c66c997c598f8be47937ac0bd944d13d55a9c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLH2L2300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe45a6894a089ebebd1ace5aed2a54b4bdc0c688a033ea3f885977cab9c797. 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/SE5752421407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ce83fdc010a5f030a1194be4fba3052bc4479046c7cc1cdd6124a8cdf0a071. 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/NLH2L2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4603f2a26047c57fb05b73d1c10ec8340f1e2d25ca74b92105aecf64bfc33590. 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/NL8RL2329476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5762beb5f356b9e3fa06a2a325ca6191c91af98428fbd165f1dd1149cb87dec. 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/NLQ8D2101146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4ed7268c51329cb2f727cc52144bf51351733fd2f77a54f7dda2ea6f09c809. 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/NLS762100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217263775e1b6d4e958bb33885ba3f5bb2a55e4a0d7b97f9d3dba7d6c9add652. 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/NLH2L2400193.