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 0x83e881649113d76ae342ee33ffef3ed3fce617011eabbdc62d2ff5c47e47a0c0. 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/852457ba-fb00-4f72-85da-179fd029f290.json and https://artists.proofprofile.net/proofs/artist/852457ba-fb00-4f72-85da-179fd029f290.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 0x12ed9de89b785e912377a6fc1af7f336ed31a56ce6afd48d574b626e13e9ea10. 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/UST8K1790121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc48a07103210de34350e01cf76572ad256ce44449a5ff15f85dad7919df568. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GBLFP1843811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260ba11789318aa466d60ff7b7005cc68cb8def762ff870896b928041dcac35c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZCE61864608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2eef5bab1e343506a311e80fca8321bb205a50127d90b35381a2f84ebca59. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZCE61864611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce914bc68182bca86fd656e949b67223002d477ec23356cffa932262491bc49. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/UKXN22025268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6195dd41019161c1492c0e51208b7d30a2adcf12451bc433c149b9505d9d56a6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKXN22025271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa735a27b11c6b6031176bccdaa83c95bc48b35eefdffb17ff57974c2eaf9e806. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/UKXN22025273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667f8b837f5e0f40c9ce3e0ce9209f66ccc581c797229e5e872c181d7f2a23a4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBLFP2359999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c43f42a24213be3e14a64b23b6d30e33404102cc3ee21cafc85171f352e4de9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBLFP2360000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013d2995d08c9e204a4896dc83cb20af4bb64a287210e04fb27304b82c58eff2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLFP2360003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658b2ff5f63d150bd19e1c88e25945d239fe56ed51e7ef1f1a602348a5366ef1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3Q92518265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf423acd47d2e859bd22dbade9422b7b0b7f6aa677f089889e05500a440871ec7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBLFP2589003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa56e42b2f66bd0a4e8f9a4a01c9fda6761b1e959bb84e2cfd377f744235136. 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/GXHAF2576688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35423ffaeccbf5a04aa481e79692e1f6fb1084700f1b463699bd89c8fcdfdf50. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/NL5MF2102650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1386fbe9c2ae7c5166d97ef1a1b024319ae4e85023d162ce334ee090619e9a. 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/TCAHD2320580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32359041157702be406ebd9ff58496632b6b56e78118beaed0175a7a10dd820a. 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/QZANL1742775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6786edbc7ec411007900b9ac22fee7cd2acc0e6aff778b50471b51363c9018cd. 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/QZAPG1766111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35423ffaeccbf5a04aa481e79692e1f6fb1084700f1b463699bd89c8fcdfdf50. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/NL5MF2102650.