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 0xb9e15a19e69f8aea82cf0588755a7ecf7a723b6ba11bfbf51ad8fc00a71207cb. 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/12ba6197-5cdd-4e0f-87fd-df526fff8fea.json and https://artists.proofprofile.net/proofs/artist/12ba6197-5cdd-4e0f-87fd-df526fff8fea.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 0x3c9d3b66eef3eba623c19835bb2a6a4647fe47580bb8695242580c8c4ff30c0e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S2262385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd647c911d7390f16ee0dcded9d5884fde86e3e61a04e5ce418b562c7b8687e6a. 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/FR10S2262386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7100485ac53c34867b188d5f01f00672da1d3368b334367b75c045899f9cccd. 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/FR10S2262388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dc39af373aeb52778d2a64011f3255398522cd3b64b2ebef04c3033ba32e78. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR10S2262387.
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 0xafcf78e3cf8fd163ec2b4bcf2ea846857b3a2a27ccb1c38038ac2f55b1440fdb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR10S2262392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b0821feb19e6551a657fff6a8d6c63226220cdd3a34219a4be02990df3aba. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR10S2262393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb64eb6728b59f2a5d653fe38b7be55fd0ceb2bdcc4f5217183c3b4314339bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732007363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d9b876bf267f73f21c1a89e531720e0c7f99610bb01ffee29585cca28e224c. 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/HKG732007365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07e1589af31d71f5e20e881917ec1773e63309a6304001b64343d5daabe867. 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/HKG732007366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978e3d5d4b8636b92ddad48a1df5972f8db495637f98797c2b6d19974577ab06. 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/HKG732007368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e054aed7c1e0acd3f694fed75b8d7bb4df4755afec9c1dc28d5af7579d181a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732007369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77b86d663e5ba87ec75630a05c1b5922c098a79feae124a465b19b6050d4e6d. 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/HKG732007372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbb940e39c60e974cac943832c2effe35f2be6d9be76697e88fc0d13104e71c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKG732007367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cecf751dbb8da64d04ecb1e3b6c5c7257cbc17937f9c3480a5c2444b63a73b9. 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/FR10S2296875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4adc4a012f09fe33120d872c5edb280a08bcc4d270953a3039009914b2085e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S2296876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5188e1e046db0ebe75d5e872cabef09a01357954be103ebfea6c84c036abcd1b. 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/FR10S2296877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37897fe612edd63a403d5b8f6546751eb08a53518f5386914540b60475683b02. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S2296879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27e04939bce557626be74d95ba2140c5a7f9feafd1968e5d887139cda0ffd58. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR10S2296878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b54f8bcfc89dcc30848f02a107a65b15c99589e881620af3b36800d7f99889. 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/QM4TX2025632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b86370a8c846fcdec374cd41385e972276feed8e09f0268b360add1bfe7fcf7. 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/HKG732259766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d67669b13fa1e9ad02c9b36a9debbabc31c678fb4e1763bf97296faffc4fb6. 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/HKG732138739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efa2507851228e6889d3145116b528f13f4673f229cdb66c3a9ae1e805b554f. 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/FR59R2088476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f282536a4cf4abe0f8ee22f7f4df10bb6fc19b25400b1b8b12178f37eee76f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202090093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35953d4dcab9a62dc86493b98871ccc73c3ef08a437a4bc96f7a6c51f2fbbe5. 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/FRX202090094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9562aadd2016cf741f4bbc0847aaf7ef13b21d1f533e3d7c09ef66c50bb019. 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/HKG732007458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f094726cdc310d290497b0d55b40433da6c60006cd11c1bb845cfdf42e23bc1. 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/FRX202071196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e052453691ecf6eb07ff17da9fdffe8d7142ca0925248ae0102aa32b242de3a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202071197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073bf5ec0f585b5a6780b41c6f18b32436335ac6677ccc77422bf21850cb9d4. 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/HKG732007463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99bc972d71550889dce9ad49750a0edffd18fa62a3021ec0b467ecad31ced91. 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/FRX202080789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b094257798bd3fbedcae52afce39922ccbf6036de853bbfa08dd80020d27817. 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/FRX202080790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d760ff319e9441b003c52425c693e3c1f7e2ced47b36ab695934745fec1f906. 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/HKG732007460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2155affdd34a81b4d2aaadd1da53afeb29f2b85ef2c38cb1ac1a9488b8a08221. 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/HKG732007461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9346a3a849e49a37facbc090694861613be3bfab23795ea7a9c260f5b799a722. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:31:40Z), 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/HKG732007462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada40e30b7c834acd2f1ee4c70bc742b899e06bf0fe4c99b052c524b75a89505. 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/HKG732007465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fb71d3e00cd7452267d88a02797f000587effe7990605247069898f516bb49. 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/HKG732007467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99c99d0874a8b04df82fe366d128fb1c052727e5658008cef0de398c5c550d. 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/FRX202048645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6672e70de8352636f21f66aa475301dc3faebac6b23d83919f70b3ec4b099794. 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/FRX202048646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e7a101cc27536df72eb9b204f7137ade7e0fbcd7df2e641fdab2b142683f32. 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/HKG732007589.