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 0xb8fc18171d7af1ea75507bd4123b70b8c244b5bd8da636655b8992c0d2c02a49. 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/5834a6f6-5926-4b01-b854-e09b85440ac7.json and https://artists.proofprofile.net/proofs/artist/5834a6f6-5926-4b01-b854-e09b85440ac7.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 0x216c9180ab82f9e454dd23314a915576e02b062bef26874ccbe8a309530108f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARSPO2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b5f87d3a23d976287c9b97fe416810c27ad3cf507bbd114992dd210ae1f22b. 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/ARSPO2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63524f2a2d76407f811cd012e17691e902ba8542be2be3275b2618d8541eb36. 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/QZMZ92452320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3f4c7f6a9016cf5ec824cda754c9b923325cb4bf8eebdb19364a4923661c82. 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/ARSPO2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a0b9a0edbf3b5c678aa7c32d1c7c07e34b62f89f90cc876fcacf6e5ce0370c. 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/ARSPO2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd75e55036daf42736c4b9cf6c7b6b887713b70543de4edb6cdb88d1c354767. 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/QZW9L2302043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16302e52356b73a1d306df89d9e7fbe85f802f46d10b774d0e8cfb77d607c5a. 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/QZW9K2377307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25175a206432bf1d94b527222950b6fd757ecbd47fa10ab5319d0a300eded99. 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/QZNJY2347968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4160c594e9a6f3690a4769d584c7ba13973a0bf374cf9bf5247889ea640e5aa2. 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/QZNJW2378074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1019a7d758935508bd83ffcf5a7fec5457e6af3471955c1a73f419f90397d6. 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/QZNJY2150046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a63f037c6288eb92bbde053d58912e5dda2a478988c3c2ff546eb9fecc5cb. 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/ARSPO2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86464453d273d0667100e87115b28c6654257a00a3a8284dd76eb212c4ee5ff1. 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/BK4DA2451289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a33e8e999db49f17228d7737aa4d41e4713728398927827b45719051f622a8. 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/ARSPO2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab2a1237ade87cad34f850c8fce018c245cbfc23d909a35d447b828a67e534. 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/ARSPO2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4decd88919b8866db6c8ac66b78d662c1c11a0348c66d376dac7998cfb9bb7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARSPO2400007.