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 0x9d991ea04f793d69798d70ffe19c719ef95a68769593f85077fb4586da9eb432. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6c742ce-42ab-41fd-833a-ba5448a7f2b1.json and https://artists.proofprofile.net/proofs/artist/a6c742ce-42ab-41fd-833a-ba5448a7f2b1.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 0xb667be7bef001665c6846509419de42e851ff70eeaf7bba51bf5bfc8e76fee76. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9K2277808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3315ac2d04a6a0b4eb96d7669902ce0cf3cd348808532c4901af5e6509897236. 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/QZW9K2277809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56526d3437886e6441a71465aec821a73314ffc2beed77fd1e1f3eda69905036. 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/QZW9K2277810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e80d88abcdf93758168707d01bb5bae78d4a19da73536b72224d53d727aa1c. 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/QZW9K2277811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e0be027bac08be59cbbabc5ea234af4547153ad53251a514456798a8806838. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:06:42Z), 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/QZW9K2277812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb0f13a3879f8b298de0499bcd861d318fef40f8b952d4f1e0873f0cbde5a46. 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/QZW9K2277813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d651573a134fcfb672be4e0e7edcdb5a896253891eb522ace2b2b206dd0ecf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:03:27Z), 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/QZW9K2277814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4b73db71a308acf99b1ab951a711f721ce88bf14b646a36b3f4b805410548f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9K2277815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd869f86fa01e76257c99332a56f332256cad3f02020b934c076d61ea822b91a9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:11:08Z), 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/QZW9K2277816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b1f4862c0b780baf9fb00acf978fe41bebe769c2554bab34ff5bc1f6a03821. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZW9K2277817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2f1beac6dc278112cd1b6ee1b4d005cd70cb7327f8f5b76aef721cb7be0a8a. 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/QZW9K2277818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d44c11c6288bcbb3873c4960f1a69a737fc0dbf6e3be37f831d8c4b8e15f310. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZW9L2364696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a90954950f626dae6ebaf50c1e724b8a6a9dd469680bc2476eaaa01625ab8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:53:19Z), 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/QZW9L2364697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc58f51fa59671b96388f258d494de32fcb575589e27e6d0b2ee76e122270d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:24:30Z), 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/QZW9L2364698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d097cba88357faf8a6107770118c8d7fcdb3bb1ebeb23f6ec599718347ea6d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:55Z), 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/QZW9L2364699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d15c8680f319a8a1fd56e6d1e4e3b3511d4002c89019766f0e8264cb33d316. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZW9L2364700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab72286b4ef3d4c67777d4ed4dc774be1fcb20d4e48a135a0e770288b3f7842. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:23Z), 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/QZW9L2364701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e4ff7ac603a01b24bc7c1e8456b4f03c00cdf10adcdb0aeef282182ee01339. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZW9L2364702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3af07ff4e6191ac2b60b8c36a970e190e41616b86f62591644f416fb1e9cfd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:06:56Z), 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/QZW9L2364703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c6f58f19e219ecc4d1bf153f7bbc9b8db47f5a370d3577bb4a80a218162e68. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJZ2503888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f59871da77202d37a3d1e4678ea035e2ceec1c9951cf455af8671c13ccfda. 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/QZNJZ2503890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1fcdcd5965e63da58743353b11206daf47b61a2575528411d11676522e550e. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZNJZ2503891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d907707fed54ea5360c22765a006affc00e7963635f955cce5f6d322a5b2035. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:24Z), 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/QZNJZ2503892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7534253a66abd79a72734a3a5bf7c18b0973217129f5b7daed33859706a94d. 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/QZNJZ2503893.