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 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 0x71e21b970610283557bc71c590f7aa95cdd237aa81214c9e5011a6414c3ecdc5. 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/f67e3fe1-ebe9-433f-a0d2-5e3841026a35.json and https://artists.proofprofile.net/proofs/artist/f67e3fe1-ebe9-433f-a0d2-5e3841026a35.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 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 0xd4f745bc7ad84c47ebccf738de703075d3a3250410c00af002f00ebb06ed3122. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEYT72000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec63935e7e4ff50bbaa7fb3d167d39a714903c8bc25c5d9d698790494b385af. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/DEYT72000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c0e7b2ac064487bcdfe9e0e146618c69d1a8f91f18a3133e7d3baea44d88c. 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/DEYT72000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce991b22771eaa252ff6aa42ee81a5c3311b95d5c9c94adeb1dd9283a066b9c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DEYT72000259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82d6e5b57088323f545cf9fc1e3e5eb7f729283ffee48fc628da28c4871d23d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEYT72000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ccb903a98d06eda4acf8fe42b0e2e00f107516184bb35605684a715f9a20c5. 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/DEYT72100324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413949eea1fb3e040788e00aeecd94d80b0e6734228f681b35dbb42e69714f5d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEYT72100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563635cd48645c3fabf0557d4066c9a7eac669c4985195b3d61028de3fce810d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEYT72100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178e6df05ff9f50bed48522c540b348c4c8be6a04a67613c5cf6ec72973d7bb1. 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/DEYT72100665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6eb0828780030697629118cbfbad38b2dff5e30bda83a187d24f2d2a0390a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEYT72200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6a8ce9bfbe3b7391c4eac9b3c9da7b1a10347d44a418bfba4f194600f4933d. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/DEYT72200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af1e1212c29e9ce2cc846556bb0036e244429f8d49a43669405968a4dabb799. 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/DEYT72300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cb750f1691ae7aa8dd477a79ebb3930b4c6ba68bed63174c3c568e51c79e7d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEYT72100336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13718cf88cc7d8608cb82be81f2b08e65394d99fd25db31ccfa0394b0b940cc0. 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/DEYT72300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c4186c25f6275eae03065cbc12d634051da370b313d627c92ab923b482d39. 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/DEYT72300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9b101a346c7776821e20b3208fa9a646c17168441c50e3f56e39ea8d5d8bd1. 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/DEYT72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1287af7ff6f76c80ade9500a8e0adcb186885b857d73b09ce5595df3a4f4fb. 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/DEYT72200520.