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 0xdc01315d28154359ffd8463a85b4af22da3d11c5c8900db0d6d09dba885deb3e. 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/bfb86761-13dc-44b7-b2f8-4042f2bc99e4.json and https://artists.proofprofile.net/proofs/artist/bfb86761-13dc-44b7-b2f8-4042f2bc99e4.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 0xa41f5460ff408697e615304ef7d535853254ffba7fa8a4935586faee8fac69a7. 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/ITP541000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe99e5dd1b9232fb52ade12d40c7a00236c794a36204557be19341f26d78692. 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/ITP541000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd473a65bd130044f2ccdef1397973839d90e526c2221ea37eeab33407e66e7af. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ITP541000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37328f003c5477a3d4bc2565f0a6e364f37cae42f70ec34a844b98a4cf20d719. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ITP530900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734f6ac5aa01f3aa6225d99b5722118a8cf9f830e7809147df556d9e0eb7bafb. 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/ITP530900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8380d4d187303a37e23e9cdc91d62b8bb756086569a95675e7351e5c7b0485ea. 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/ITP531000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190aebd6d704be9f6f59aaa25afab6408dc07a7b95316322c80fa16cf920d2d3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ITP530800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae8b666652ce843d304ab2858368191b082ba0281ce08e217e2b5f2e5a1c337. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITP530800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7401e313fe74f77e12a9227848a8063e8022fd09ad5a1beb13777f0195dea250. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ITP530800459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc371c1d087f656f0b42981a1aacd77d32a3c83785fb5013c1bcce4a457261603. 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/ITP530800466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf484ebfc7627c991ad4904ffbbf1cb19e963562ae23fcc7f7068cb640e1d178b. 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/ITP521200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c085eb189a16a13d625e240c4ba9e4a9553ac75563958837ace945e854d7dd4. 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/ITP541200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3898f092d83aa11b99db657856321444fddea62d4b35b75440a01584ef5594. 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/ITP541300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576e667b4d78817ae78e702e7250edafc7bd2782bb21f14669316a5cf2dbfdc5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ITP541300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ad4319122553ccab809f46866bbf913eb95dc14439a9ec846000badfd32a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITP541300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3ad6867759370bd28e491e88756a377fb35efa72c3221c77c8b2d5ea596f5. 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/ITP541300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5983a4cb63456113cc53703c92e2ef268e704432fd7cbdcf4df954c5180b3a2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ITP520800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54833e0eb1548a6b1d770a8f0b209e9e2bd95900e632cec8a80ba307d6f7040d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITP520800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b74ace99d501db3ec0e0036b78fd97f4544590ef4669cfae7174bc0c80c9cdf. 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/ITP520800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd39620a839141dd0aa15e3b4591833b43d0e0813a38c21bfb8ed31e1212d600. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ITP541500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ad81b1bc74f875d49cc2b409f3610f6159911532b19c3abca0990ee372cce. 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/ITP541500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4542c291f37c0511c09800f28def6a8ed856832ee936c5fe04e12129a467e799. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ITP521600198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e8fb5f6bfc842bde02f7c97b0155ae08cfddfd46ff42efeb457a0b9794d6f. 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/ITP521600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1256e11b0e537882fcb561ffee67ba1a5771ce8c5f1b0169e56bcc50160b5eb. 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/ITP521600194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb306c6c2d03181c21a1c856c8282bb65c94ca84961487f028d00435bab7611. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ITP521600371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8b36add80bc9c9235d6494e105909e017205159b343506a414c2a69355fcb1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITP541700898.
Una vecchia canzone italiana / Cara Italia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc2043fa9ed426595e25c293bd1b69cc9dc8725ed796579b73f18648ff108da. 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/ITP541700901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3c640a805f822755cd6831ede50d3b317723592d0c661eead83d9c80041ea4. 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/ITP541900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe2e3fb4845f80cf44bafc97088ff87f2f68d7c59e26edcfeb057eac9c4b5af. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USA2P2523253.