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 0x195670ac1d56b6f2f17ba27bbe1506a855123794e115779e2acb9f90a377d129. 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/6e0fc8a5-7619-4d2f-8da4-4b5d86f9abf8.json and https://artists.proofprofile.net/proofs/artist/6e0fc8a5-7619-4d2f-8da4-4b5d86f9abf8.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 0x569aca0061f200daa2faebb2a68c8d6c7c5ee2d2698601184ef2a7d11a286a03. 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/QZFZ22109227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce31a0cc0e7ed8e4984598925f55ac52df53bae1336525d179f0a9619faed1a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:05Z), 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/QZFZ22109229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fbe02e11831f2e16fafc62bde6973409f93cd7747d91b8b2382311ed3e73ea. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:54:16Z), 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/QZNWS2199034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6235f2963bfdd00f79eab3f274485c37d87f5cdb062fd66c98fc67f0a2586eaf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWS2199038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc54278395c388a3987943f517c371e5951f6f57cdf3e4339f8371020d2d92b. 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/QZHN72257036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe6923f6e50aeb0375b4b840a3a5194ce19b69c326af5f20f5675ad415c1bc. 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/QZHN72257037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2504c9aceb0c1d421fb20f2b8783b1137fec3248c9cddbfef5f67c1dbff7ac. 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/QZHN72257038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabe42605de88ed7968962d1d185428e4bb1330feaffa9bf281e2143fc49f816. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZHN72257039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2bc526d103e07b7bd344345f0eb8a6784c80416069a991de5264393b8a2067. 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/QZHN72257041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c9742fb4a5991da535f7abf023c0a549b8116f1917132efe9838b12fdb8a92. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZHN72257043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9571ba38c6fc9c14c71dcf6bf17d1b82037bad12cce7f05355ab58d7546a55d. 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/QZHN72257045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd45ebe1c406c3d6ef5a90e20f9727f5a03a0dbe36a8f2f8a9a9e5745b91bcb9. 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/QZHN72257046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87666d810746751d2b2fbdba9721316e85a79ded4fcdb2264b625903bb00d992. 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/QZHN72257047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb8f967c487fc9cb5ea976eab557f9ce86b9c6b239c344318f659e0035baf7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN72257050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a732382fbfff3a162ca19359bf20c3486ff952b544ef41fb4a942e198c3e8d7. 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/QZHN72257035.
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 0x26103e39a5d2f08c4de32c548648361f3c4be166656d7364517d62dd88371b43. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN72257040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b07e901de8f3258cdace7a80b83fb4543349202c57ccbc3e4a298e91960c7bb. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ42251490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd4014d5a4ed5aed2e2e3b6ed37ce243ea586c4fcc780c67e3efb69598c782f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHN72257044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa803c75863cce3e09af522d26707d5fc51a6996ae716e9fd1c598d4b883acc76. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHN72257048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3879a4add8b6a1c8ad9a5af7f3aeda2183163f98d7fc868f22af92a667485b87. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6Q2340340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d49c7cab7de6f7fb1e4afe1700888c42dd4dc48a0842071d93e404d20651e82. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHN62488878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cfe31bc3bea5e8f426fcac7ea481cde943be7512b6db8e97b9340dc20c9aac. 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/QZHN62488879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d20c721e31138344ace08010d284c25f094594ba9a2a9e77e086ba478970d0. 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/QZHN62488880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45db11a0de863c82ea9a8093d7c7dd9041734f7daa9f1c0eba5482bdd080be5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:30Z), 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/QZHN62488882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287db1f68c1a21fdfab2cbffe510c5283dc4117fb9f428cf25e9fdecd89b12a4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:28:02Z), 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/QZHN62488884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474867b10b34c3552991861823b719426aa0603f3c4d24579ae7ecfcc06397c6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:00:31Z), 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/QZHN62488886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac58c806079c9b5c43c72e4b169bdc51d03e871e000fda6ed872003e911cdd35. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:29Z), 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/QT3EX2447499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a594099bcd4d4ea18e7ca09e135af66debf139ed4af4e33e170e7ff117981. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QT3EZ2432884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc40f8c156d59ff2705b0771462a36dfb3362aef814e4aa4a07e0263d6990c7d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTAU2581360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1d623da758f15b34490e1dfd277329ce61afebecd56bd735a74b301a3065d2. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZTAU2581361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd6576da9372a8b66a59b826af44a3380571326666f2bf20b30437500e7c33. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAU2581363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1db69d4c68b6326dd7f04070585b375220ffdb111a9bb9e8d52ab1ad6d3fb0. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB42510175.