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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d164a0eb045fef13cabb17a023047fce6405d61a59b01aeb635473b1b97e0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8308e02f-1367-46d2-a7de-5dfd4d9c46f4.json and https://artists.proofprofile.net/proofs/artist/8308e02f-1367-46d2-a7de-5dfd4d9c46f4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909163570b34ff44d1a27594238d1d00f17f3677d80e32eff3d2d01b42b2b993. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHN32393544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1054d52bdcfcc06b3e01d92f780e3d9dacc686965cd16d3bf52e012023188ac4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTB42367559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8107aee3b278089c5c3168130da264d371c1e8dcb6c6a2be53cc62bdff47b6. 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/QZDA42479537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc49d4961d795109a6e6275f6ee73bb4eab6e541e1c2cb4dbb37e548831483. 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/QZHNA2471127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046b529c6b1f0e0592767d45091da2eb278909b923fb9f8ab85fff72835b852a. 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/QZK6L2471558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8771277e443a8bd7fe35cd5abd87995d499fbd4b71a8bb49d8cf76d19d899a16. 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/QZTAS2494214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b5764cca99ee66b83c325431e76ad94858711e3ef51cedb8c44384e592282. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:51Z), 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/QZTAU2452786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf344aae4493422cbf62753676f380748812b2ceb96d9fad38fbdcdf11e66db90. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:54Z), 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/QZTB22440939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade06d81a2f8673682849ccb1f383c61f0c96902c574c9a2f840e893edabecf. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWFR2494236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b5764cca99ee66b83c325431e76ad94858711e3ef51cedb8c44384e592282. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZTAU2452786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebca6bd38b837f2be95c159941c05df933958468bd557d368051b62acc82b5ec. 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/QZFYZ2549201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9118c9f37976bb62d3a3360a3f858f968e656a4de5d39d58e297501a2490f1fc. 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/QZWFR2494238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfadd1c68bba329d8e8ba870405611345a259344502bb1b1bb0b3d55229d1f0a. 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/QZK6P2594150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8771277e443a8bd7fe35cd5abd87995d499fbd4b71a8bb49d8cf76d19d899a16. 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/QZTAS2494214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c9804bf63e4564f9e60eafe4f7baf2096cd8b629d9c1b0d4335c0441d7fae5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFR2494239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebca6bd38b837f2be95c159941c05df933958468bd557d368051b62acc82b5ec. 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/QZFYZ2549201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c20a2c0156ba2a6a6302f326f891db704314af5ecade7b6e4167b398f7d0d22. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:16Z), 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/QZHN42504394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733f7402f0394dcb03a21e87c1524c6e0d32500a0ee5496e957f54c80508446e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:20Z), 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/QZK6H2519878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a94b74782e7307aee9877c837666d83564e977551c641eb77e868112d14feae. 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/QZTVM2469041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a938791ccdd9bf799a8740479ef50feece6ebd11b8c109cf66b939eee3a6e74. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWT2421021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa000d97cb51a7207d0182be0487c8211fccf8616773cac758290fa8296b58ba9. 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/QZTB82400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d73210ee2aec624fe05e869fb08d9e669b7495ae2af42d07674b558838efa0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNB2496317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7253387f45f6e2460fc191b33ec9957971eea2cace40b3b616e5c2d89aab7385. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72335352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a679255fe352771ad7594e06c931ecd95b8762658b0fb64a158cc978b2d7e4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB72322925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d504cdb82714d08ebf6a59533ec1dd1649340340c0266a1aee20a427f3835a. 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/QZTAW2318324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2018739d895d474b05fcf0d902aedba72f27186e1f2d1c7fea34190aeb233fc4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MX2832457461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a6fff33df227de529def8b5671ce9c5edbb3c1d636371d099b05cb2aa2bb0a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZMHP2429089.
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