thumb|Glendun, one of the Glens of Antrim in Northern Ireland A glen is a valley, typically one that is long and bounded by gently sloped concave sides, unlike a ravine, which is deep and bounded by s
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 0xd0805dc2e1c61e8f35595ee20964e288f5ede64b50cdeb7cc8ec9a3854961ae9. 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/5df02a01-a0f9-4614-8dd4-a707de597a3a.json and https://artists.proofprofile.net/proofs/artist/5df02a01-a0f9-4614-8dd4-a707de597a3a.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 0x24d94f5dfe11fe7422529aea03c4acfc8176eb01ec8c8cf35b7ef344814f12f8. 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/QZNWT2381749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda176706f59966443314f05f9141582879b5160c4ca372c9f0563b81612d9fe8. 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/QZNWW2391733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34492854a3c82484078b9456c69ebf07e1463f95559ea6dd899650f510bc2970. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6P2472348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0007fca3347ff3c1045158f373bc46a6eabd3b2834bde0efadaa90cd69f8edc7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6G2481191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd633d7e1fdb80e5de05849a4160836a16fc01ad2a17a7643c9da3de118cb3d72. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWX2480818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb007bd010243a881db501b24927ebbc8bc4e70d919c06ee755de6d3eace9fc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2470781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143a994cc4bedc8074b98651f3dd91790ea3194be87870cf07e030122f3f61cf. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZTB42469733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019906760ab1c622c3d60838835474d38327662ff04ada4ee65c3db3b0a54f4b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB72414621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fa72603b50523431fa3fa9b3ad0a26de89c83ba9573e9cc7468c7bcae0be40. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFH2479146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96228f50d852af54e5d7cd9286659c67dc0816ebb8992e2c72e0e217f5b37c81. 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/QZWFS2485507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c4cf3891a0bdb369e65e5fa2357d522d80ba1a47e3e0f196bd4cb59e009ad1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ792437929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e03b9f4d92be6f0b98d514a99d6b5b857607729d4c5971923110f616e20166. 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/QZZ7U2412391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb37e46bca7b5dacf9bb58e4a925fa31219fa56128d6cb5bf1a7202fc873668. 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/QT3EY2434113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59efb2d065418cb77dc59cafbe3ae5bc0e47ae4c5c1160b613f55a207e675885. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYY2529272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650b2fb7f0259073b003aee93ced4f0f7424df3c7a5e7cc7eb090d33930404b5. 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/QZFZ72560953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcc92d127a1c8d1ecbd5c571038abcd68f2453899f8cc318d5be856d5c9da89. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNA2574642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd0d4fe7ed10690caf1382623858284b18b1fd225b046aaf69a4f7de8eed8e3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEN2519053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a18c4b2effd0150cbcef26ca464dc2c3f0b7a00583a08268edf230102a134bf. 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/QZTAS2522039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51bffbe81806b581e75e9932d36f4ff42c3f267452d332b58471ff12c7a18b8. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZTAU2588356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe452ad87bd7bbdf6cb6f2cb780870d988f1bbcba2286bc6ee06f7e59dce7dc6d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZTAU2588357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674cdb068e75c988e1d902d8ae133459ad4d644312ed02d7997308a76d3b72ac. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTAU2588358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678d37402aab6d39957cb1e207779eeda7d574be0f4ca6146ce36d5848b413da. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTBB2518608.