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 0xa488beced857d860f0f13bde830c29bcfa764a69fabc8ef7b6e0b8c949cdce08. 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/5aa08a2a-d2cd-46da-9684-aa93267d8fbf.json and https://artists.proofprofile.net/proofs/artist/5aa08a2a-d2cd-46da-9684-aa93267d8fbf.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 0x98b81f9006e92a1abe61e842ecf9a9f53f4083276ac3b9200c9c11f0598acaa4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HUA631501236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84cab285182aa82d67961e66a695ee2236dbe59b7ac6d361e01f9c8fd3fc857. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/HUA631501248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4a425cca5378bffad509885cccdbe63b11a4118069788b30dbb353bf343297. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/HUA631501250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6670f34217dd8612a7c7298240870f169ec0df3d2cf119b3fa548d72bd5b311. 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/HUA631501252.
Akkor Inkább Úthenger (És Más Klasszikusok)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62522175109b654361ed767a6ff2ea2ea02c6b1b32f2e02453e36ce7336bbcb9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUC301600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b1e6a14e34fcb0d5c63505de8c81db691157b1fcbde34a63b2396381f8b6c3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/HUC301600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc0bf0ad9096679c9f824784bc4a275525abb4a6c4d8d41d3e75946dc740eb. 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/HUC301600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1c17e1f9de44131c00e83a99324ac028b574f893e61df1665db17b20c267f. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/HUC301600128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522eebef5bd6dd2c405b9f2a871734dc41a8badf72528879a34421af3f83239. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/HUC301600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82bc42a1928fd0543d1f212230b60b7ea988fa168328a10177e0ee53169b73b. 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/HUA631501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4136f018b82723fc9667aff747fd2ee49ad11c5ee15edfbdefb36d8dba04be. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HUA631501351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27182cd72a6506e159d89802dd4fc29d3fead45c926111f242cfcc8ad7710ac4. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/HUA631501354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33318f19d2823743ee9f140e382d3b78e41a78516b83e1f4cce826156ee171b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/HUA631501365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6d8802f8902c40fef5c5333228e1dba8671b0acc9f2cf4005bf551cf84fbf4. 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/HUA631501368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72644e0e17cc684fc565814e531dd685ff0430f7a093894883c3d15bca0c4683. 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/HUA631501375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18854469f8944f0884a137af81f70eb1895bed01f3e5b19846d35ae13c14ee. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUA631501378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810125266c69390631be3fce45ef964a3e91caeb427faa04cf9aac2ba628206d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUA631501381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a6ffb8e68acdc651bf7bba60541010b442c40e947b489bd38bdb0d1f0d2889. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/HUA631501392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969bf847af726a46d1115e5cec78ce00786cb6704255de781e73e61b67b0ae3a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/HUA631501393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b28b735c1fe8453ac41db13f44fac043a879243f020788683b1f25df758ec5d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUA631501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5817ed038b0bc074028aa7ef84b5387902ceaf6bb71862626386e7f2e946eb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/HUA631501398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6774d71de77c156e2799b4256e9ca83cafcbbe7d7eb36f41fa489b30b18da8fc. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/HUA631501400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023b4eced14cf1d658a4a7765d792b4d4051761d51e89c6d0159726d7f63d0e. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/HUA630700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb341ac3db59acfdd2b77275821a17f97d36970373fefebc4ce80b45619d38ff6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/HUA630700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e6e3ee5726385c4e7c4b4ef0172334e5a0196dd53f9ad9bc03d2cb51205411. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/HUA630700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79746fff00904f80e4684a15ea86e8efdc3c40b3186ac1a03256ca132f3ec110. 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/HUA630700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf21a1c82dd5b38e3dfac33eb105ad1e3752a3220c2c29b2a28f9c62bc075522. 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/HUA630700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa222ed8ce819d4038bfd91ff51ac1a291fb880cb0421ef73925609af394a30e4. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/HUA630700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6db0bdca5cd966d4618e9eef9a513fb8b3ccd4772620cfa296c9e11edd5d228. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HUA631500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79af4e89c951664f409cc4c2efae839eab5b7e5312e9956eab2aff41714c7ecb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HUA631500997.