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 0x6949fb66e5dbbd3833caab53b830e1e83e71130d5000360b08754f96fd93fd39. 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/e10d47f3-99dd-4fb5-bc55-6e69d3b7f3d1.json and https://artists.proofprofile.net/proofs/artist/e10d47f3-99dd-4fb5-bc55-6e69d3b7f3d1.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 0x16ccfd1581f74d44e28c82ac66c7ea10c4a954d982d5478d582affee5983995c. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZRP42153662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d2e5b8a07f70ad755ef2501c4ff58a6c8fc3d595d4fcc7f7737c66a360e937. 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/QZFYX2285157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041116d1fd4d50fb2b29ec4dae144afddc81e4987326f0cfe35216db74cfe82. 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/QZFZ22245592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5641c7fd80255b7523d6b5363496a85044c37930d8e01478b16e7a8a67d4613. 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/QZFZ42288364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eefb0f113a60cbdaed5c2a694115819fdb0296111c731f7c543aff31e7cc133. 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/QZDA82260686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b4b414cf0860d841d447c6fe388bb25314ec4c7a0833bc47375ba46e10656c. 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/QZES62239663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a48e52187831e9aa25484b8714e0cd7fce6da7e3fce6ada297b188d6f16603. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZES72299153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bc9fa089fd6912acac32b0eeefb53ae84a20e3da9ff711d4f1b7c6921d7d79. 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/QZES92261863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e465fd56875bfec1a7e5d644b013eaf52d2bbb811c490ecfb3cc34e5e14e681. 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/QZHN42289390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e290d21b82c939d42e1b2a8f78d75a92064f5e3f7d1b9ab9882bcc7221e188. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN92264031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565be30497e69cada43f63c575055dc61e8cac30c525deaaeba1a6ab894f1671. 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/QZNWU2251901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12a93d8592538246df3eb9a0937ce01c59c0a46bdfe50d5aac7cfac13331c5c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZNWU2288001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe588a4a7aed335754f50a5562742970727479850cbd6ccea465c0ab47b9e8bcd. 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/QZNWV2261484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537c7334c6f6e18de627c5070aea9f3ce84d904bad5cec12ed92a7534ecad919. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZNWW2242507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8339fd7e7258f1d2ff0822d6ce8dff63c89073236502bcb146a0375d46275876. 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/QZPLS2247516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cb6020b5ff15a794d0d1e068a866f0b2b772f1bf7831985a56476b86fd0cfa. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZTAY2213537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54eab63b909a8491e88206b13b387d7ec8e7391467769a6177879e0d82463f4. 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/QZTB32282221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedceb158d11f1d5ba4185babac1faae332fb2d3ea80a27e53471a6e92704e69a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB42230441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2b25202847ae616b54f433c04a50d04923382cb508e65bc175a32e1bb5eda7. 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/QZTB52289985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2ca8c306f87e4328a1c678cda899deb372cb5540bbd85437461b9a7e7dfdb6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTB92206381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8808f935ca612bae5c0365451fbc4a3de022cc411823899f4f2d733f252da750. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB92209192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e36e4fa8c09eec5bf89f419f29d1241f9acc51aa6d5e34432630d24235eafe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYX2363285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05732758ac05f124e9c2cb5a6a1dbe480a75abe8e8b626c12237fedb82f3a6cb. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZFYX2358608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693c73a64c902c4a07e11be250f6e580a1c5f39a06e5a5521c2701bbec3d6146. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZDA62329114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7b8273beeeac626ae6eaa9f17b63e3ea171ad5e15ceb98a6dc664acf72f379. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN92304329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab9236ea01efef385566b0dce3b6c8d87a831a266100a188ab4434919e2c473. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZK6G2366891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167fde23a1d5ac430a6c704e371ef729e307a04bf70af1185154354d5cdc9663. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTB62306523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1ad195ef0a9c5425691aac703df932ea936cc8c4a322db9906519e86d513ce. 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/DE1IS2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f7e48cc4064c262caff9e953436572446fdc9228ba9786d19dd1618def24e1. 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/QZFYX2471731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc3b0e22340d96b95d94b3507e63c877b3f0e19ca0aeaa182f7e444527a67d0. 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/DE1IS2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8b8b09edda9f0fd5d9c06cd355c9c712446d59cf847de70a1a56ee763eb408. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DE1IS2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d79eebc11a2055dab61eb0e5e2e438af75c84022c8288681819f681825105. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DE1IS2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954e0d350ecce98d6922825be6c2f12e3ffc430722b9fce687103f5782dfbe0. 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/DE1IS2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3c99e7e63fccc20b1df2ceaeac58373275086128d3f5d87278850911e613e8. 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/QZES52294003.