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 0xa6e931b40250d46cfebe2ed7d012ba9ee76956fadf19b4c4f1ad85b9d8a59bd7. 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/87d33462-e6a6-4bbd-9b66-7826ab3cb7f3.json and https://artists.proofprofile.net/proofs/artist/87d33462-e6a6-4bbd-9b66-7826ab3cb7f3.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 0x598e7c08b2b8b80bb137824fff4c6262117442e720338bbd869d9b4139d445c5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:34:28Z), 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/DEQ121747540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd223f3b8d64e05c1a2191d28de67e8363111b68dc7a1b74541d16cc90108cc0. 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/DEQ121747550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d9403ad65ade9cc2ec2f21d6354496769cc7a0d57fa887242bda95265b60e. 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/DEQ121747560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1268ac8f2c89c317993a537d617e393230b413882dc05fa64825133c1e66811. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEQ121747565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f0420fbd698ad1534194f529622b0f8a582c2dc3c0d305e7e65f59803b6e61. 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/DEQ121747567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc18f0371de5056695e3c045fcf7b104a05063c310fe316d3e15d514dda3d0a. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/DEQ121747573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef848d26a7c4e57eedf20397b937b14d24e703dd1c15ab7ccde208ab09611b9. 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/DEQ121747574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7860c12392410c3e2421be45e889328cb080bba2ab4843f4b72309352ad6945c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEQ121747578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeecdbe6c12e539bfb09ff1ebd36a17d57a66fdb493da0fa771144598470306. 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/DEQ121854647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d254b381ee92d8f905fb8767c4f7ddbe296c2ae7cb30d79e17f951b7b2bc62. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEQ121854649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a0f7322e67a7ed878a76782020ca8e513a951387ea82b2298dfe32eff65deb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ121854652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657aaf23862ade67444ae9abc4db474256033ad39dd8c8c9197379ec373510f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ121854655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f7733acb42baad81eab77874c6e459ef0f82f6ef788e567ef9ac3f58c9be88. 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/DEQ121854656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2305382e12b25365e57425763285a03b6504d0e2ded90a16dbc05dc892089. 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/DEQ121854659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa88e45ed417bf6cc85bcb92579241ca6ffaab21b0ff682839eacf4f9308390. 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/DEQ121854661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47fb6629b9b82753f4e3c80c6460a1fda6b6210b59365094ea60a9d57b7c28a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEQ121854663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734ca35ee4b97f3f39919b817e63dab920c60d2461d1adc250e7eb14dd354e36. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEQ021907134.
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 0x11c6fdf0d5c0ad52f33303ab584160bbfe58138cb81c471831fcb5c53b822c0d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEQ021907135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efb290d66e4d032a8c3d8dfa90d26a8bec102d7bed95a46bc9a9e501a2111b3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ121854648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1248559da28c29f5158316f23b8bd57c30f483bd79f75a0cb75679caeaadcfe9. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEQ121854650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82011100bb88781db4a4fa946fd96ace4e761a6256177ab8d097ad5f12d00787. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ121854651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb42f6ccfdb71a4490da3fd7a14fa545f70a234524bab2d0b4ddbf6ac81570de. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEQ121854653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee63b625aec297f1b6c0e50f05408656761dc9ad0bd316da195a2f78af5b7d8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEQ121854654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb366e9c181b80fa2c36774daf9c517516430863bed1bc288b6cf75bda1928d7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEQ121854657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5273b95cfbb4c983e1aec0153bca5f12f4d9c21569ceea33ea6cc1a232e2881a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEQ121854658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c060a25c564b3e53ff5ff48d8b8be41196d227671c61f544d4646cdb6b1305. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEQ121854660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93c5395c5faa18b64d71bcfc0dcc94d86f9040687d4dcc42f3827dd9665116b. 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/DEQ121854662.