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 0x22e839800789a85d611d56b18fba64ebaa00fae23c49df8278fa9097064ab0db. 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/dd19a64e-9b68-430c-9900-7c5fc0c54c33.json and https://artists.proofprofile.net/proofs/artist/dd19a64e-9b68-430c-9900-7c5fc0c54c33.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 0xca0fd556a401c260336531ba1089740b5b4dc5f4142a0643fbda6f7690443cda. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:03:40Z), 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/USHM21762200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbf16a67c353ee5e5c3b13adab4a51bda4ea534af740b123fb84fb014610f54. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USCGH1841606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb321c2679c32916bd87664bfa2684c557b01f3f9068dc9988ac888919184ac. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZJRC1936096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6720678fe3ae09bdd529897d58c35aa0a409cea4102d8d284801c488606b8a. 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/QZH5E2343758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b4754c8b301b3f535a99701e63bd6d966106a3d414e3b42f2a25cd31d547a1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USY242404822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de7f70c99e9cfc3246583610b2476b2ea10531981a018fe8f6e7826960a11fd. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:47Z), 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/USY242468033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc6b29da6099f810e3b0d28c587388c2b831e799fbb81cd43da28d2ba0ff10. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEH742501964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea04b22aba569d4d03d2e878b48282d3f9730d112da49592026bc6f7c302732. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:44:54Z), 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/GX53U2504074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdd2d6e59b8617138714167c93faf7c6985785c7c00125d9e968fcc4f937b4c. 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/QM8DG2557269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935c010be3b5906b1396f8edb50c43047fe99d5a385f7f0a6467664d5cca3254. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX53U2649512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a13ee5bcd97d4aa5ba72c565da2f6696f06ca2be3b9fa55818fdd8e898d4ca. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX53U2682607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6801e9e92f0f1a460182255441fa2050913890b557bca735bf9f4b25b6fb22. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM82432764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db32271beab08e3ba783c0a20f901bea928242026166537378db42bf6cbe54. 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/FRX202233533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fedeadbf017ea3555b2d8ff25ee8d893fcf32509ac4e62864b40c3551954a9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX762394576.
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f19695672c778a50795aac0d34ae43b373e571ed4ededd31da08ad651ca2728. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX202233546.