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 0x026df9f6cc1536514a82b0ec9194dd10c5ca2bd6aa158db58c725e868bc49454. 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/a4125b53-9a55-436c-a9b4-dbda0b2e95d3.json and https://artists.proofprofile.net/proofs/artist/a4125b53-9a55-436c-a9b4-dbda0b2e95d3.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 0x1ccd96efdfb00cb873141ba1ab6437a107eaf7573d11df83c89f8ad02795c9b4. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USHM20710628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289cf70dacd9d6b456cfda06a7e84aecb02588c88255cca072b85e99966078f5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM20710629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed83ca0ebab62b4e026a61213749086f7101a1a701600a66f04754768cc560f1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM20710631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2017eec24fb6a9d616eeb7480e33714dce633f9705af07e2be83235c0ceb7456. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USHM20710633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6a597f0a7bce7090ff000073f95eeeb657d6cc56badd79010904f838c4c4dd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IEBHH1400027.
Caoimhín Ó Raghallaigh & Thomas Bartlett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad95a1152e9ae9955afde6ea1197b69d1744371889adc636ed1b731abbf93d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBCPA1901482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d1bdb7a99fb88c2c281700308917e65ff91b27e3c59bd397949d700d83827d. 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/GBCPA1901483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0c2fa1ceda1dd36e629325b2c616ec92eac319e0a0a0f6ad779878d5df742. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBCPA1901484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e41bf28218f6e0479a4badec45d74a9ee7137379241ceabea54fbd75c902eb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:42Z), 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/GBCPA1901485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d6f10e450b555fe9d2a89348b52a0fe93448aec1c009ccc282570737dfb29e. 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/GBCPA1901486.
Tempall An Ghleannáin/ Plearaca Dhoire Chreasain (The Humours of Ballykissane)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9192162e76775d9ceea5096c9ffbd737fe016569c4fd397e3ecb98486fd8692e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBQSK1102408.
In the Echo: Field Recordings from Earlsfort Terrace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdcef4c86d8264eeac77d120b5c8e442d13f3b5674a963c8e2c5f562ed6b92d. 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/IEDTN2100007.
Brooklyn (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2521d44935ef9b63067f77b7e6926d4972c2fbfa5ae67724e67038e55f9e9f. 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/USLS51557505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd280c936a46d0a4e6dfd287f8ad114277e4594d28378313bb0fc0b9a1a5b2052. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLS51557506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde55bb0af86d8a99bece189d561a56d86e835c6bd4c707f17c8a0bc17b51b06. 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/DEE471400532.
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
Tá Dhá Gabhairín Buí Agam / The Glen Cottage / I'll Tell Me Ma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6255c0e2f1e2402cb3d86c25f273da08298bdf071887ad8025c323252442262. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/IEFBK1000006.