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 0x5950a2efa8a665c8406a2345110ffc4e979f9a749c95fee1397b6271155f725e. 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/a237f448-ea37-4cef-ad6b-ca4a0031a6f7.json and https://artists.proofprofile.net/proofs/artist/a237f448-ea37-4cef-ad6b-ca4a0031a6f7.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 0x9a5a67265922438b58eded36f229da4209575132b6f798a60f9964f49b015e0f. 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/ESA011652596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd222b3c8de0b0ef7656ceb4ab3636091f3f756e6ae5eb5363c9e1ae3da2a1638. 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/QZ5AB1742092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3542204ca7f8131a8425c06dc475f294a17c94458af4a20c7dbe430431963a34. 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/QZ5AB1742008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6e08116aa18a6697af81501373a0fdca25e9a2a40bca6d40f7de3970c3f79f. 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/QZ5AB1743456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5629f66bb1bb05ff9387b931133ff27c571ec91d4c29f91276ac53fbfb069044. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:29:29Z), 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/QZ5AB1742673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecdd7f303443e6d680d04f79f4852f46cbb8351a5eac3999c47b4c7cd293530. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZ5AB1743424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6083914ee48769710daba02f82e9792abee70fceab7a23b24da44bc496567560. 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/QZ5AB1742005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad3d5c7985ce3db800e22fb8eeda883dcf37e3eabfdf330678f69b913d9f589. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:20Z), 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/QZ5AB1742237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de5bef10e74fc736a6c35df6db150566c976f3c70341e1d9cae4cae1bc8034a. 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/QM4TW1755344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dad188d9f6bc31d0542930eee4df57a1674ddb1195c3e51af722f0fbb91d571. 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/QM4TW1755345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba161ef12b6de93588d787e15611a62c6646e0486edcf751aea8f27d394da53. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QM4TW1756799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521d285261f3f6cf8dcc216de04110a860542f3ac231662d63e705d7e98f0359. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMDA71875086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc4c61b7b4c5144bab599b4ca28b0a5c9c36d04435e52b1038899e6fefa6d9. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCAEE1966635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe317a9a98f5347595f049990d998b3ab29837b1660cf1b981c80ae38f960377b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAEE1966636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3321680b4df42ea394257b3a156bcabeda9229ae108b92bef8c287d4e878e7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAEE1966637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb90ae99884518907c6ffee74feab629b8e2c1e8d4e91f9fe267301f67b2d02. 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/TCAEE1966639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a502ec8ae89f2677b78bd28b30f8c26b5786f4816276ce93396c71c8637744f. 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/TCAEE1966644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d88b73bde8399a455ccfcf4f2560c8b9c15db7148589c9029a9a39666cfb19d. 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/QZS652247106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdfc598ab88109eccc5bbf1e56d7db7d641a206e0220e35e82f7e353e9c57c2. 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/QZS642299514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b48e4cb8ba26d7bbb2b098180be52f8be98679e5dd621ba78dfb090cf32a9de. 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/QZS652252790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10036388a10c3f512ecdb5e136aa173c2815adebf9dace0e4c3e7d5af295155c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:01Z), 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/QZS652221854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6363009d9137dc79a175818558114bfda1665fd6a985bb6d1585812c894d0f76. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZMHL2256415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7558472e6f3ad7c331599c4cc0e1c588c0e5e480dbc5410800869a27e02fd774. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZS672264239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d2871922ff2051987a475249a82d5a53757833a5109db72293bddfa7944ed2. 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/DGA052334404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda3f7d3baa422c4b9a8bc146280e0adf44fff66774abe35f20697c5bcef546. 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/USA371471230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf19acdd22249473e8a13fedf1bddb7c2a2f580485b113ad9a35ef312e64c24. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRX621316170.
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 0xc236862800e561896d3199e2de6e3c97334e14400425e9d4fad44b9e4e84d2a4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM6N21995947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a1d43d7b15d62ead6e6bc2e1011e947e0f70539f06fe1af51573c1383ba30d. 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/TCADQ1848132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d6ad3278d07b1de33a2398cd84fa96d665d175f70a07b17dce3630e6b8a220. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AOA031522630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515196757c5818dff42436b66b99aa03ea99d787fb00b30d3aafaef45a66d491. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AOA031522650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80763b8cf0d5e5adba3fa92cfcabe6e972e336261a46ea3a2f7b02bf2397f35e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR6V81466589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44ea618dd16d27deb68597e41ea19bc0d091222944f2249d75e270314847163. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QM6P41563619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e62dc83fd393ee322a7a0b00b7b8ab1639fa053ce68590d6c3f101c488549fe. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMFMF1498246.