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 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 0x9229cb9437c43f623dd059e7ebe5b2976f7d185d90425e58e774d4b80611d016. 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/adce9794-d060-4efb-b6fc-42a00d48bb24.json and https://artists.proofprofile.net/proofs/artist/adce9794-d060-4efb-b6fc-42a00d48bb24.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 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 0x49fd337305bd31c01952dd981eca028449baacda3836a43677faf591b849920e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR2E61700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb734ad6119e28f1558caeec34d0cc5c608a8241b937d16e629f85e3e96f4308d. 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/AR2E61700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab98bdfc6fc8c80d9811bd88688e7bbd91dd86b0285823f64119e1a1e2caac89. 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/AR2E61700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9be7bb84490cb023b1d1d106a6ec31821dbb424545d23be07e05371d026583. 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/AR2E61700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4295ed92e8c3381341c69f6c5aa943e3adeded76df7b9dbbcba877fb3d14f63a. 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/AR2E61700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aef5fbe532767e0480313490c773146bbf699591e7eba65f188833031256b73. 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/AR2E61700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c93bed5573e689f9a0e20fd77a8fd023744ddd23ec58203a50b09dccc3aaf. 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/AR2E61700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7218c509ab8ac3b851f07d94d8ce8c10f1dcce3724f355c51b1b70b1de0640e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR2E61700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa440e8703e8d5430827fba9cfad890c2a88f5862384a368da9746993a89a8ba2. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/AR2E61700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4f8b0e3c3223170650c5fe6f1f93e76a694281a3f114ab8d7e3720bb9849fe. 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/AR2E61700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f38406e91cb1c0a270944792f99108391e3081fb64b721492d6d45686a6f3ea. 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/AR2E61700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a810e4b1cb8bd56df1c50c95b6d45893e7ab40855a95713994530160b2f26f. 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/ARK531200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ae1fd6b1daa9c4fd6a3d36603e1fe5983f93221291cd471816ab93122d59b. 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/ARK531200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a386dfbd7a0874d6270fbc0232417a7dcb268dc88938c1c50c1d68fd921b0e9. 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/ARK531200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8838b66f2af3efbfeae94b10c69ded7132461dea02376d432bbc02bcbca45fa7. 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/ARK531200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ddda329f6811814b6fadf5c98862da99419eea418c401c586d02649b96561. 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/ARK531200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52434ec93b5ce84d4e9974e5b0a7215ab7bfce6dc58d68a12d09bdc7b106f222. 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/ARK531200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d2f5a1d49f3a5cfbf65df953ec3531a0d8bf1da3e5498476917eba3671d9b1. 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/ARK531200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e28c268ada7c240fd90bc0b447eb6093446dbaa3057e8867c210cfd3b50d56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARK531200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6456fe612ef649b484e4fb2857a2a0c321c533a5db83dc61510a012bab26897. 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/ARK531200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba459bebb077970f4edfe9938ba6fe03293637b55d5dd66591bca47434cf1a88. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARK531200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dd8b1520dd16d619ffe93ab7be8385b34d2edfbd0396fee2edebc1607e161e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ARK531200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab50a307664d6f9c6c1cf8a050cf5ad675c43375c821692453fb207d2d56223. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARK531200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f3b4b8f23f3015d8800083a1ecc6c627be3e005af44bc1795a2c6bd618837f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USL4R2498994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c93c09d790b3f1d2bc5c6510002411b506409b403ce05f3f57c7745079a945. 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/USL4R2432121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7d36028efbd5be0d6a0fa560afb4fd5ce04d0ea865716c141c107e487de423. 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/USL4Q2489736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e75a1196ae9af419c777bcf2be30dfbd4073b9ca646ef4145b8504ca0b99ffe. 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/USL4Q2456693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e32250ae6bf9b732e173cdfa755729e139b7e56b4ddadabf3b385bb7802982. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZKWA2027669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1478a4057087c6b08595b1b822f6fbd16e3f76d57c13e1f815593953a68b056e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZKWA2027670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3744fc7b822250319d7c75ef11beeb4c6e31169161903f5f0446ee73f2a92c7. 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/QZKWA2027671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1071172fabb046b48207a308aef6045db2cac2f23737232868fd68d7d64da66e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZKWA2027672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde42f975bd426298394a2698ca70d9ec9b445a0cb5a590588ba99cedf74cb78f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZKWA2027673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf19f085ffe04e5e5687ca4f7b0c85d2bc3989bdd967ba103ee2f6b443145c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P2069332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62be00d8fdb6294b97e7d3eba3188314e3d80971e7a2abcd11f26ab9359ea9f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZKWA2022506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b96a1c92d7dbabf8e5e39140cee6af25447ffbecf194c3529a048d62ae7e2d3. 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/USX9P2069335.