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 0x959920e85a13e3c58aaacbdfb4dc7b15153b07855d9661b8a24610b1e597f72a. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90e4e433-bbcd-44fc-b198-41b569f58690.json and https://artists.proofprofile.net/proofs/artist/90e4e433-bbcd-44fc-b198-41b569f58690.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 0xfa849234163d8c289ca9d2cc17d341e38b6f0a54716e8fa8a21b014f0fdc48dc. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:40Z), 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/UK8261900816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ac772e06d9695388dfeb6327c64652c7615c642e2c6c561f199f0fc2acda9a. 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/UK8261901085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9b3145d64e45543c2acb65fe268ede448bea612a0070b0cb2035bc14191f89. 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/UK8261901086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea003e1423d1e8c30d98cb152a3dbf57f96d94036094ddde1a1fd0c6d223076. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK8261901088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb03b53d5e97bf150e9632025c43bc7c4e3a0d6b8718fe00b716572ba538278. 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/UK8261901089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24954109bd02ab3a26e00cc29545ec60272e234c89f0e79e2a6815699402a4b4. 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/UK8261901092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6fc8c3517d63078a1eef8a58b175d99afca60c5534669cf26f61ccfae0ab54. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK8261901098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf423c56bfc38c3a2feb60a70ee68d0d16de8602a5f5f4bd456bac4ffc89e33c. 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/UK8261901099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6103a820b9f91cca099713d1ef2caa745e39e3894c20c5c20ea4d8da0791d7c4. 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/UK8261901110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d7b9da88fa1d14b3dda69fa34017f64f0d66440408407fba169643cdc2cc1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UK8261901084.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b43e12f4569abcb294c09c5ec1a98d3645404aaafa994cce4c982bf13cca49. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/UK8261901087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bab9706c34b61a96a141b1f3afd0dc7e4b3dbc9c9d42a84a71b24e6a5369c5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UK8261901090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93891609a28fb0797eaa3a8941333d3d6e23592820c74484bc1384679ea86280. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UK8261901094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4476f91611705918de9d7918f1a8b63b4428e00733807acaf68ca6b0f0c264. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UK8261901111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e51011ca6c16fa28b75c44722f318aba9fee9dab5136f76b1d46a136199477. 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/DEG932400616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45198872a7d8b1ea89c833054cb5a259fc0e1a247ed17479605fb954ea319fa1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:58:32Z), 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/USYBL2401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b4ad4b379719a1b4c40d610554634ee568a445e626edea5dedd780dd641b99. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USYBL2401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa175cd0be31c0bb2bcdb395e1a53299d368afb17931df515def582afbe3c68ab. 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/USYBL2401006.