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 0x98d8f5fef296497453df0c85f6d331e94d1743f1f94fd6521589b786ef983851. 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/b73ac7ec-84f2-460f-9f29-72e236cf4b6a.json and https://artists.proofprofile.net/proofs/artist/b73ac7ec-84f2-460f-9f29-72e236cf4b6a.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 0x79b2332f09e5c17a681bca6d4b5718bc2375a1f4209294e8f22a66641e4a8d79. 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/QZTAZ2283643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1112ef23e9326e782f0fde162b57bbabbca230a9f3f6ecbc54a4659d6eb5bfb9. 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/QZTAZ2283644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9775f3c8292ce4f83158d0a9bd48837228bcf005cb5c9df1065bb175c00d96c6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAZ2283645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb380d34e19c792a11b0fcc096474e99dfe6531a85ea1e812564304e57b3cee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:19:02Z), 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/QZTAZ2283646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1802d6621db82fb02cd78190d21816807bf17bc6df76bb02aa558d89c77eed. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAZ2283647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe583d8163d5eaef40eb9a9bcd5237e0e408a7828fce5cb76f09391b52aa5686f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTAZ2283648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b1324f169718aea3621862d264e86f04fa3ebb6a5344f0b95a72e1985c0e3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAZ2283649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f4ce90bd6697a23065756c5e1308e4dee360167b25d8a3def75482d1b25c52. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZTAZ2283650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d3e21b98a0c1f908701c10505bc19615bc8582d77a9c0474ddb4601833bcfe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAZ2283651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712356a46c8191f473857b968f75bc61fee6f5717716893c0e17f69e867c1624. 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/QZTAZ2283652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16170d6361174a8bfcb53806ca3fb288b686f856ed7f6f162616c71febc9fb89. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTAZ2283653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f560b728c3a6f829e2169359d57be2a198686a473d7f897f5cca00f0c37f2e. 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/QZTAZ2283654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3595482b272ec6192f25316c6a00c544b6db9347f27d7830132de2e069089b15. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFM2441492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe829e18e12eaf129a59a52eba7655c5377f6b237154a354c2d368115c9512ee4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFM2441493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa265a5e41afaeeb7023175458223da3d99f6717a74459fadf8bf6d14b57f3c4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFM2441494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5fdb764d2768cd7cc0cf7e7c02319e61358ad62835f1d9bba39767328144f9. 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/QZWFM2441495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3dab695b5532de091ed97bb36b411186edbafbe1c4d41bc12a3d08a9a0ad33. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZWFM2441496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904e7359f0d4ae1fb63efde780469287b47651ed766265cbfe92843fed7288c. 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/QZWFM2441497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d5db617d9c5e85ac5701e21e7e813b39772ca598f29ace0508120b0937ffac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFM2441498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e44a358d1271ba68696a2d988a7053913025f8afd112cbdb599c89c64cc9f6. 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/QZWFM2441499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa9ed4fa0cb8af73d258d9509191194bd29a99630a36ffb61053cf31c1583d1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFN2481106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb804b3e58a8afc3f542efe3273a36c9b1b6396e42f6721f2035d69e60eab051. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFN2481107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c53a452ca9cf3249422bb861329164fd748666cb2306b37f4f32a561f2cbef. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:14:46Z), 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/QZWFN2481108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342084fd87d754661cea3b44f24b6b37d6f276b6107b52d6dddebf6c721be6b6. 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/QZWFN2481109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcba4458818ebc576e163474c20e9ec27aa031921fca5ea2be3e44a7da822015. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:29Z), 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/QZWFN2481110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef28839649afd7420cde8102f24387a5bab5afcd3b62df8229e9d8641242e4f. 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/QZWFN2481111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d189fed3b983e50bdaf4a98a1c4a028fdd0d40c9dff5e9e525f50b37b98482. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:32Z), 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/QZWFN2481112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290aad614a806509286b149f2da52a653541888183f5221245e50f5b9bb73bcc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:03Z), 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/QZWFN2481113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9948622c80511ec862ac292e15deb2967edcb905f61d418c90bb51ed4e39dd55. 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/QZWFN2481114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333c9cc1165825bcf2b97af81aa0468dfe91609f60df34726311bb5c46f2dc7c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFN2481115.