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 0xe93fadff396b60934cab8f5af764646d3f1d4402f2ed4a89b62b6b94fb850cbf. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/205f3c0d-2a63-40db-a60e-61cad7938735.json and https://artists.proofprofile.net/proofs/artist/205f3c0d-2a63-40db-a60e-61cad7938735.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 0x1c2532a325da66a71eb376ad753f297f61b403a3fa0fe4e69602163797552c46. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/MAA172001069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094893c526344418d67e48a4f8473eae970ac79c13503f9f3ae25b36f708719c. 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/MAA172000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d2b6d09896be58aaddf82133dfc278ddd5dc35aef5c6dfa4037f66bfc2a544. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/MAA172000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae79848f550d5359da472b0109e199f34038c69d0afd2de37900aae051e5a80. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MAA172000493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877a0f646a2ef4be8b9d8d4bd36967ae0e44846cf8f319e4ec35a0538515a976. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MAA172001111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bbb964e0adf69c5b6555d03eb327a7b06be17f55e08cd7183b997a12926310. 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/MAA172000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c17dfe58e7a039475cc8901473ae47cfcf9125a0011030aef44dc698f9b015. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/MAA172000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe99545a8831f6987843fddda2c405af4d39f71c42753a5a061f41fabe95f12c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/MAA172000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f596ad015f8134dffebd57549557ca5464b4a2206bae90bad869e66ae541f. 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/MAA172000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2a9ec7989d1a112d7589e93a3d13d683409ae6409126e9bb9d8d50be2ddb48. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/MAA172100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34cc0697b7132262b958afa8ea3a33e2e1094acd5233c2eb18e8fe18bf874f9. 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/MAA172300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334ac514c5fd82e4826d25e827dfb971df5040f847a94ce1b35616d4fc9fede9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/MAA172400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5486707d8aed680395e5b9db60b97d80338332da7eac88359d6c3cd9b878a2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFQ2584816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f326388462b595d3c5f3762046a8055634d44ad61e4636ca865f64839bc9bbf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3F42510856.