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 0xddb78d864ea1bae23dfcd6b5aa6edcec7821a8e17aa2fda42a921d2f4e6fa06f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fc01072-e840-4b85-a56a-1bd80e3cce20.json and https://artists.proofprofile.net/proofs/artist/1fc01072-e840-4b85-a56a-1bd80e3cce20.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 0x5437eaf7f2d1da136ce71270b1b015231375ac515aad7e6ab5cff0fc4ecaa682. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR10S2295723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3c1c4f98890e8d5349bfa44c97a202f5d4d91cbe87a7e159b810fb167da5f9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR10S2295727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe296bae3488144e8686033e85a4d031e7ca0b554a2ff21a1cfa946057352d66. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR10S2295728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa322d7dc70a1b2bd403fb917b00ab06f43af10386647090547a8cddc5bbd0bd6. 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/RSA131405958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bab9858970b66637f6067aade48f6861e5979d94b465debf83638d0a831fd0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RSA131405956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9891ad1cb07ec017cf42eab5e4d6f2d88fd3fd684212a27e845a30c9c20050. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/CH7812189298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc257088671472159fcb6fd8564da697804c7b66ca5907504e4559fb6d68780. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/ATAJ12100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6002ef9c1b39bd5758a94bfd0ff5614c619a2914e3275f3fb82435e3857feae. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ATAJ12100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe8aeecb5ae92fb54e328728c70ed7d6f556efb4721a2bd16062090305e1fd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:45Z), 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/ATAJ12100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013dd6af6c69748505d972af3658cb42624ac4f8539412a157cf3d078d76f35. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH7812196913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dbc4e287617050eb6fb8c362625d5b10241ea9383b12935e28bbfe3da12505. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:52Z), 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/CH7812220648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3611dd03e11ccd4833e3e96763257f6df8e97b14ebb0510342406b6e36e666. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/CH7812240637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638be2424aa2451852556a620fba676255e4598e5f0b4e4965ed2fc4af79e760. 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/CH7812241266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7a2aa81033f6357b023eda2a47e7550d2be7d24647b9bf4e12c52ea972e799. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CH7812241445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3c4f6adfcf4a7e118aa7fa26750c592e2780c45ed2fbdd55a88b10b8930ca4. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/RSA141303432.