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 0x02b7ae81bbdd7953a079d3471fb3d6865474045bd0e2ef75096c009daaa1ae7b. 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/75109eac-2321-47cc-96e1-7ecfa215c2fd.json and https://artists.proofprofile.net/proofs/artist/75109eac-2321-47cc-96e1-7ecfa215c2fd.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 0x483f360a4808124136cf5eaa44d08598f3da55e1a96c3c6aba612efb35f43f32. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZTBB2479096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bd9c9abd8c6fa4fdca2175d9f0e5736b3e6e649056b96ebea293f00aa952db. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZTBD2401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efe360c6bacf75ef6db4e3cf603eaf0f8ff1aa824366df4c8e37c785c49675a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFH2481555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe612130a0ba8b78d2bd7ab527bf49b8210b9e4f90ef88e07876326375bede6a8. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZWFH2481558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc743aa61007e303542b4f1d7dfd89b25e6b2e20a9ae44702a1166938dfcb3e79. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7N2458417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc993005a14b472c47aa3a617909992ea48b7f9485bb6c7713ead6cdf3aae416. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QT3EX2463041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36be45ebba4139d9168a3c1b09af42e28e53642b350e19a3a63e7ec5ac348044. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYY2518505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411cdf06f7e82e8af89d692eb76a1c778725b69f8228389f1de414cbce495776. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA52561292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c44c21487f9c4410d7e3a7bd959947f9f268c6f17c09e79e99ea0e1b8efb79. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZES82515074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11faed2ac4e56814dfc55e6f788bc822cbc5987180d419026b9fa6d38aefaa66. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZES82516939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c44c21487f9c4410d7e3a7bd959947f9f268c6f17c09e79e99ea0e1b8efb79. 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/QZES82515074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e3a84875612728fadfb27c7ff0089f65cde4066802d1abccec0404959f49ca. 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/QZHN62576625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbedc43912fbf46d864838092640961cd6a5d5b5b7a520ebfdfeafcbf68e061. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZHN62576626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a718a0d92acaabcef73ea83752bb1190deb4f2cb7aa9c6ec65fd1c1f350d56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62576627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57db77c597f865f2e0f4b9efca4784df8a33934ba3b29670cc204834cbfc0f0f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZHN62576628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5be96167ee4d2b38e385c7574e5aa6e57c7038b1c0454826dfebd6e0bcd342a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN62576629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11faed2ac4e56814dfc55e6f788bc822cbc5987180d419026b9fa6d38aefaa66. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES82516939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f0913e41d96c62eb75a7a8c5a836bef7f9893884fc9757efe74b5cde5bdb8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN62576630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba55be0247ccd0cf8a03123eb5afd605235f25e5214b0f9f54e6b7d7a942cc74. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6F2522612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019eb9ebb294184d18f67be8130657382e170c291f7a7df8676ef4b9b3c0d03. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEM2535574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9701e30d215b96debce05368ba295f45922a3e8a296defd094d72678aa676988. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEM2537556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63fd0931cd00b3547b625a10d360591c09235459775884b62291b0eec9b737b. 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/QZKDK2534111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed2818b3b0babea28d36889151907f0ea70fb4bf16a9ebb3513fed5834a747. 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/QZTAU2515393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac76cfeeffc692095b4bf68c51580580a0b12468c03d9cff37d54e7db15c3291. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAU2510852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73797fd92a1cc4edb04e7c52921c449600154678edbeae5f4eec90f425023875. 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/QZTBB2503680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca122d7ecb7e95f10b36b6d27c64de20a8c0962d3e8526198abd8dc2ef41b6. 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/QZWFG2510483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f61eddfdd87835bafc72d41585a2a5ff208fd25380d40031905732910d63f1. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFG2504674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f52eb43d87065f575a4442e7a578494029ed48c355a5875a9fbab04af50079. 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/QZWFG2512903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c662a6718b1042e16a37ab0791ff164d03c66dfb7fd29356377ab36f735a0b7. 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/QZZ7U2543581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d020be7ea6b9bfe46139302847fa33cb7a3a228717f58c5d3d9e14e2b3b98b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QT3EX2503413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0b3e8ef94104c21beb0883937d1a02315bf3d61272971ae1cf0535cdc26c75. 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/QZZ7X2553570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa066639cfe3a5064f8509530a1e68f808767b87f46f347fca65bb87818cd2725. 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/QT3EX2505804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa077cd2bbd53a77dc22b04cdb385897df51d3111ef3ef82a9aa80156a9332fa5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QT3F92519816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b5f46f5893f4a3cf8cb6e4b117e56c87ab8c0d8e7c46deb0d0a679d8bb83b7. 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/QT3F62529187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acdc329deb73d048c3d86061af42e256abad0b60d0869c7cb7e22fd0a43c25d. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QZTBD2401413.