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 0x9b3eb4aa194424f7d461558c46707e63f2d921d79e4fe9e512e15b601429d71a. 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/0de68873-fa84-4d99-a117-7472948eda85.json and https://artists.proofprofile.net/proofs/artist/0de68873-fa84-4d99-a117-7472948eda85.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 0x8ffc4f2d380312b6e71e1016b22466cfe15b0e88bd0b7b7142cb59b123ab509c. 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/USANG2174858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6647898219813a82edf1ffbe916ebf7eac1a859f289e7dc5ae800f2f89d23c1. 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/USANG2174860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9da61e1de4355972eb2d610f1f0743e08c6ae3b3f9542fd30b964f6569b8bc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USANG2174861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148eaf0cb99cbdbe0c3e90c747a0a85d74fca1d324d59e3d510e97c6edad7192. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USANG2174862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e36a7b2ef7e78b9e7e18535ab1071a66665abb809cc06a7becbc3c2786ec48. 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/USANG2174864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc021c5900ac51d3f43f0c83c207f0a685df99ae793feb120dd7182b2d872f0b7. 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/USANG2003099.
Bejbe musím jít - Řáhol x Dryman & Denoir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bb660f3e1132bf18ba97657ad1514dcd27d41390ad225f2beb1f5a6b01d186. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/US3DF2113989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579786f7c714bf92157e81a672df8c9af201c8df6d3dcde82f8ea5f70dac862f. 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/QM3DF2270050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36c5b441311557fb87838a0373450e875d86a29023083ff8c77d9752f87aaad. 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/US3DF2257059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36c5b441311557fb87838a0373450e875d86a29023083ff8c77d9752f87aaad. 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/US3DF2257059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e1083383e260b985aa92a2296308a712be189d836312b8a7e9e6f506faa214. 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/US3DF2289940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf53adf6018fe8f0a8b201aa4ccc0c80b4b1966192d614ab99aa9e352305738. 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/USANG2286018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4a6a2f3a914291aaf037da3cc1f97ca329b18ebb72013c6774f530f5a5ef74. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QMANG2261016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fe88c347a617d7f220ef5f39cbe72d5220810a4ba426d64955437d86e48df0. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZZ662338882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6836f48ffa1c638c1aed23df486b48868938d2a01e79a7869ae8982b14e9d5ea. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ662338884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7855b968cd73126003fba8eab2f0c66ed217b8fc69cf8256764d5ba8094db75e. 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/QZYFZ2453225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10afdae04828720217de6c1ebdfc9cc444c6e4388974d85a537074943c5ab410. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZYFZ2453235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f604c4a4be7a6d809f456df14bc4b913b6d96b41554f82bb426c124c6bef0af. 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/CZA232500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632a14320caceb798ac941ed58b049f261baa87643b6ac1a979368b6062f4b08. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CZA232500628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba63f7feef8dd3d24fb6a30ecb4e53cfe9232f20bf06c7958bebf459ad4481a5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/CZA232500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2594ca293362c42303e4c3b0f69d59c697e5fa44b5b3da06e529846c9dbb2552. 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/CZA232500631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebac4a3e6f87f2b17205e7aa441e62e925d6f67a029d454777f6f3b280d65e9a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CZA232500684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0add089286534742ff4747fe2f6cfd450e3f994698b41155edb0153d5a78ba51. 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/QMANG2291627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa370d58c11f79f8ef4a44facc869487cde54b69fc9781b66e68f7e5d89637063. 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/QM3DF2476631.