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 0x4207004a43c70f4c43a0c33eb4fe7d4534ca8d72acd439aed294eb6f5f3aa3cd. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23f34210-9a70-43bd-9f4e-9955a68779e5.json and https://artists.proofprofile.net/proofs/artist/23f34210-9a70-43bd-9f4e-9955a68779e5.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 0xd010aa7f77718d90075519871fef6b99bd87b71c8ec9adc71293638da7dd086f. 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/QZNWR2363305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc75d7573ea2f5326df0a73f439a4d7102a064a04046b0dcec04b3584d99cac. 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/QZNWR2363306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58680f18a4b46409d53690e2002d695be84bddce67537ea7bd93b9ce4b54f972. 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/QZNWR2363311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54205d14e3aa627dce1eec67b0a0075e1db0d479829a059acc83db667d0b535f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZNWR2363307.
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 0x843488c6a057a02cd77dfce63480192b0d3a61b0af62d1814078e12c702d9b14. 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/QZNWR2363308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a325b986a2eac953f300ed9a38b465fb271f17797e2de6eee9150fc285328. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWR2363309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb055776c4c93215c742e5162bb8946b7654e9a8154035a46bfe38de392c24cc7. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZNWR2363310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165404d993899ee794fb5055db6fdcf257a30f5eb5d872d050ee7241fe76b702. 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/CBBDM2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155135af8f54ed7e4d044a71bf415d5a0d1dd955b59156f72d794c29b547b398. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6F2558829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5ad2421e000850b70c2e32fa92eaf2f234e508d8e42e58fe5a713bbd8694ff. 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/QZK6F2558830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef92186dd8e21190abc2e5c6f62e0f9f1cd4bced54f0f910e9331ab5f0919fac. 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/SE4MF2500682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa6ce6456e48f094f3f6e46cb31be02b8ae10a75a7cdb7e58a91c3fc05320f0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/SE4MF2500681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf7042c4883bb736a15db0e605ba8e21d04e87b3bcb2858a5fa2929be58f603. 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/ITFGO2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17701264cc44f627c3a7e47cf132bfe15d690966d3b99a7121a2b19d29ad3aea. 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/QZPLS2437961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc953d0824ce16bab071d6fa355c1076098bebfb22cab6e32f406d8bad1db0545. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZNWS2448322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46dc467494f3f91199c4c817b0974145a8cc2a0560f846fe09a08608cee8e25. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZNWS2448323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db36f7848ca843962b0d45499e48b78119009b58ef6256a9224d92c3f2a2b9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWS2448324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa94dbffa476c74c8396986a845cc6c8d5087a7b2de8c0f26123a88ee1374f9a. 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/QZNWS2448325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87563ac26266824cfef08e6c2ec14154f60e0b5d673bcef811da8288fb45674c. 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/QZNWS2448326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef88c1570c4233018c29f6f20cfbc7c04358294ea2c79ab2f455da62fca73715. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN32464210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936507f31b9bfbc9abedfe3dab9e9b2a496fd4ef15ab586688674696f875917d. 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/USLD91733597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ce4e16eef56b541627360ca1e2d887432d103ce16a777ac71bf2295f1a77e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USLD91739428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8337677380abc7494a2ec386e764d6878945310f84898e9e1cf4bad3852fc8af. 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/BC7F22500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18179a50a9305aace612519593e96f4e454263def94c3ecaa625c888d468aaa0. 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/BC7F22500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce7e1243de372917957282188c7de6b19fee9fc25f0c39dcc3c9a6a8cf943a3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BC7F22500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b160e6f4cab684c10324fdaa0e8413d388503b2728a3e7d1b6a1998329e02. 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/US83Z2423865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378dff3b56dcf6e4b84c7b77b3316e2e1b81f75a0d305064b0891914f5895a64. 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/US83Z2423866.