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 0xf128c7b1cb53d97b645439328b377617e85e32e6ae23d35f55f50f790368aa99. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa76f406-87cf-4286-8a03-c84f3357e085.json and https://artists.proofprofile.net/proofs/artist/fa76f406-87cf-4286-8a03-c84f3357e085.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 0xcbac25eb6f3353d9417723984bcdc29c09044e1cdc6180a0d4baa1e5729852a0. 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/USANG2002267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94f0936451394451b0186869dc6a375819cf0809b3069946eccde50b63e549f. 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/USANG2002269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f8884481c7164e3e2321247bbf2689813e2d0d04566f2729f786c47c5bae40. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USANG2002271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f162f9da05fc7f3a4e8f6fcca2aa3985fd497ed950c9f4f9bdebb0c42fbe6. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USANG2002272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c0c8b6e3bcb816b0586d0ac900f569b3d593339db338d42f63a9b50cf515df. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USANG2002273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce2ec1df9e411a5f2991552e4eb47b0b28c3ee8c45ae1605e1617aa082b98b7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USANG2002274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd7cea5c8c6abd8fa87f56f7ad9608dbf44023cf7ede4f4bd5403d8061bcef. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USANG2002275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee28d3c3e4638cdcc3c2e57b99c6ff0f039f667ef10fce630079b47fbe4f923. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEQ022005422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065dfbfd27dfe4428f15246244b86e2f04bfc24d8984708160fea03471571e58. 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/QM42K1902726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b015e42ca94691dd199825e5709262916d0044c57a11997bad4f003cf47c68. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM42K1963360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ddad9ceea14c59db8f87104272dbd38b8740aaaec15fbaa342077a0701cec2. 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/QZES51938854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d17ec0ac6ec3e730decd4f9f5eed259fc0f996a095d3dd6ea8fd86e79c6a1e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDA51939731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefa50cf8fde7a577f9e6836bd8432319cac52b654aca940327207dec624c979. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US3DF2071337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe328d506c2106d0fd588cf7991b557562c67f2edbb735ada0569e97202534d36. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZHNC2071975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bafca27059dcd67b1b213cf8931e982f8b6b06119b2928787ee2058f946698. 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/US3DF1974421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604783718bb3dcaa1ec1bafd655896dddf8fb0c894c16ad5243ee32122e8302a. 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/USANG2191596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5cc75ad706a462211fe8054033d89c3450cbec09f74405fea7d1ae91aaf457. 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/USANG2191599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d82f7c1a34a68ba952d6e2a9fc7459b935cc9750f3b7b8364a3abbb63e867c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USANG2191600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4362433bdbb43df99b3defaa533ce35afaeb6db1ccdbd36b5e4c6d41a6d04e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USANG2191601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c774afd45d7dd60a84ea7a8728b2f9cf6a6d50c0ccc61be7da2d4854fd9ae9. 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/USANG2191602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d82749ce4f7484b7b7b54bb612d2cbd5661650ad854041f550c983e6ab26f0e. 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/USANG2192814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca972a991a0570ba53fef026aa0eb20fe2ebd825d8c686a7613de250e274954. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USANG2191605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5a514a7fe8df6167c597eec54abbf9d57b8a52c2c3c176d78c432acb0d1bdb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USANG2191606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34920b0b8ddd55f71f50c9b7b3ca6df138fb9720599eca7ca03f4d2d4a8b93c2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USANG2191607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547eb8f76b5f32ad55dbcab5a3ec992eac92db3076128028ed23ab10ee48860. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USANG2191608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20455c1cced7c51a6bc102a349c7737fa28dd005f035ba280449dcaca1b2f7c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USANG2191609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5c5170c43a11aac8203e0240fd5beed0504bfcc3e756f25500f227dbfa5626. 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/USANG2191610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf570b443ac3c3976024423fa700225a8c6012f8288d6514607474d556e2c56a2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USANG2191611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c22147a37380515ffa5b980e9749f6e7aa9738f63553a842023e20f6e262a4. 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/QZHZ31975278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79768a834bb15f4c138c4a24fc1cf766b20c03edf0c55415f069757bed611a44. 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/USANG1917950.