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 0x343a085a11480b7d40de1a5f9d977720a95cce0d8745a13351f88f524a2a6e5d. 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/8c54c956-6d5a-47cb-a084-856f027ab113.json and https://artists.proofprofile.net/proofs/artist/8c54c956-6d5a-47cb-a084-856f027ab113.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 0xe6dd885655d71f2d6bfcce780745dbdf3168699eb86bc6a234f6a4f63c2c88a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMHK2278340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ef6af03b5ac5d8218c875dddeff01a7a2891c255010d8368e4b365e0bcbad. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZMHK2234896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefa9fba1d0e2de3eca991eeca9a2f5e17a3de4be1080ee2094d5cc3995ac231. 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/QZMHP2332391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a95b324aeed8c893a1d9635c29db92a3310a6087791db8bfe962a92eff4bba. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:06:02Z), 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/QZS652338466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca33e9d4e575c9590b84f80e2f243dcfc98cc831d283cc1b62c798c04f7af9cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHK2351182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b853b236529ebe1152d242f96861a1de29a780e4763f76032317aeee2a86eb9. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZMHL2350270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e77886bc12dfcd364c6d42497466a469b9b2f6a56f316f578fa5cca9a8626. 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/QZS632341982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16caf4663a67ffe61bfa9d1c28d53193d89c7f3541c64d986d954ebc120077b7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:41Z), 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/QZMHL2317735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0026158b8191398ce1c9885b26a95855412c719a0127473191ae932eebd0fd7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMHM2293194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1082a214fa70de8e06ff38d14e5e8857dc35adda3d2fb73eb148bb9bfbc879c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZS672226908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48a6cf19a9fac96fc70def094df8f4435a665d805e5dc930ea2c0f02f14143f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:52Z), 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/QZS652286763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e594fc670dcf054f0dce6ee0a6ce52ef046d0bf06a5771248c2b7e41a2b10. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZKDK2272291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f419eae589a0cd3435f15909a6b38fd45dd0f1d8ab367f717ac4bb821152ce. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZS652448654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828df7dc6efca09c2b72c9e4da02b257682fc68af44b28655f74497a15dda6a3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:57Z), 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/QZMHL2442379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dbaee76d490ed7b506f2ca6b899a9c7e5b947a746a7d2d3a41687962c6ada8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:57Z), 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/QZMHL2457940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eec17994a2327c06ed918910320d7395823d487c689a83bb4f67d78150917b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMHL2444413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85f9931d56b5ff891a3de04d84437f034a5efa0cfeae9fbc530b60e4c896907. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZMHL2524874.