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 0x0d2ea9f79fcd457012d2f46e11f57ee7138890b4cdb3119c1b894eef6f342a05. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87f79616-ed89-47b1-9ab4-93cb4e5a7a8a.json and https://artists.proofprofile.net/proofs/artist/87f79616-ed89-47b1-9ab4-93cb4e5a7a8a.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 0x4a4839cb88d10788f82312e0609e7eac7fe0ccdb204779506974871b7a636cdf. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/SEBKC9701011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeb299b6e0b6922c186b8583cc3bf3adc0aeb3324f23b1ad66c51df1dd1dbf3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:50Z), 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/SEBKC9803081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b5bc2e099b45695d22e39dd850db0fcf8f6f82d58142e701daf0d1cd03f219. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEBKC9803050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61f8f333b07824b67262d34b7b30f2fc88341b49a34ebf6ac29450180fd7b9. 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/SEBKA9920040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeb0c9aee2094e833303a750ecaaa95eb671e313f0239a644bc24f89450fe8f. 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/SEBKA9920043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1589aca71e25c3f4a5db00f5dcb98db1e7361a3901d53f4a07a8be57b457c9. 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/SEBKA9920041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7b72df7d13a5588191e392e54aeefe259308ec1e6aca4e8bab4e02d1e150f5. 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/SEBKA9920030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebd4631ea63158fa0671debb3d35b1a0d6e566c29b7daca5e635a69e686ad73. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEBKA9920070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4671c191f68227e5c9d5dc89c8b0f90b56534f88a16bf15620ac2f58f58a664c. 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/SEBKA9920100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94454fc6755b62d29bc65a4251fd14c9c496e5e4c36710e8ededf3e6013a055. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEBKA0113010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96583a73bb355978a20368cd7de8e606011f9b1a54bdbb67a7de6f8d3a7fa81a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:00:39Z), 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/SEBKA0113070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61f8f333b07824b67262d34b7b30f2fc88341b49a34ebf6ac29450180fd7b9. 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/SEBKA9920040.