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 0x72374c323a5f67d15f9f49c58edda5996cb14171161fd006eafd8004f94f96a8. 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/68851a41-1d84-47ec-a0f7-b0cd1895991a.json and https://artists.proofprofile.net/proofs/artist/68851a41-1d84-47ec-a0f7-b0cd1895991a.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 0x2a6931bdc89ef8d4cb029529922a6c6d5b1cd15f5241f6b28daea7bfbeea03c5. 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/FR9W12401183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ca4b67ef3108c856d4139dd780ab599dc6e0f214e717eceb02f64c258caa71. 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/FR9W12401184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64842fbae9b510399865260e40d624eb3ce3da110baa8baab71f885d3f8b4b29. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12401185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651d48febdf824a05b89df36b2407d7bd7ce8e41a652fb1cc27eafa4b3e0a9d. 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/QZFZ32419419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97605a6329cf7936e1ed56bea8fabc00378ae41e6ed304934a175ea79c048b9. 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/FR9W12401186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd385c06bd5223fd8ce28e9f5efbdaa6569fe8aa03583cc61902c2e5eefa7a3ef. 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/FR9W12401187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d93c79d6bfe8eb142b40fa46e3f726f3f4eb676cbbada737f5c57268c08e23. 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/FR9W12401188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1f9f0104cf18460aefb534e2e24e1b080cf88e63b75a75c80a1a2c3f57e2f2. 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/FR9W12401189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d8b278b0e8d3e11bfb3f441d7490d798ac98fa178c0895fd9c0ef38e10873d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:45:16Z), 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/FR9W12401190.
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 0xe23c893cb72cff7c2a9519791988d228e29a7bfe6de42ef40bfd201d0b3d1a69. 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/QZWFH2384170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb067577702a79096f2e83ab36b91fecef56d00e701f319308cfc995e48d1ba7f. 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/QZTBF2397872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c15688e13dddf8c80d692c6ab931e90ae9a25ffb0926700b51ffbae3df7354. 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/QZTBF2397873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb68a623a7fc5941f50957a40c648b9118fcdf6b27849b7f956bf669201814e. 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/QZWFE2382467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956f9af734e6d16865e4fda6936ba5b44bbfff4d15f1c8d6f52e9623590d6af. 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/QZTBF2397875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c9c4353bce7f30dc87d15c4601773815992198396c12384e273664552da8d5. 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/QZWFE2382468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8c3158ebf12ed5b804c11f066e17bd5b1bdf96ec75268f6a7f3a5a3cadc888. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEP2165930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2267d0b5364809adcd9b00e76ad9ea949e4656bb5197ad6eb38c45a2803084b. 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/QZMEP2165932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d38457ce8e3820785ef3bcac3a48f6a0bf8ca5b64c4810288f2f38473cc113a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZMEP2165933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648feef40bbb0660dcf57e78f97658f1d1017c90766f92e4f6ebb34e03d300f8. 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/QZMEP2165937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70e5e1c72145671417ad81f5ce90b604246d5a1c5d92305f453db106467c00d. 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/QZMEP2165938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4532c5e71e4acea16694ec8a409a9b0c32f5008ced50c82b612de1ae5a92ff. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZMEP2165931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cddb1d942e37b5d40f5c5d6ab7a532a2abd07ee0afe3bdf343dd7c50bdc64c3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZMEP2165934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebb2fb48232a1cdfe8de84e517c0443cab08db4850aeec8bc2bbf99aee8916a. 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/QZMEP2165935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcabbba1848acd90ae75bdd0d0665671149f8ea6166967e56be7e580073dd3ac. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTAZ2325064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d656dafca6d9309935dd40df9f2e30e50a3be040410aceebc1774251afaa29. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNWU2370278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a110d7d33a50e79278d51ac4519b9c8cad14d10f4cf9247f92ff0e38c012442. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHN72264263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e5a084e22c8289252bceebdb2be64d86aa546174f0e9f6a7ab4ee5d9884c4a. 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/QZHN72264260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4b07b1267743b3c92bc0aa784d706ee91fef66d9cf7e9300201ec26eb1265d. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZHN72264261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3dfc395c17bd827441247250323291eaf4267efd6b028ae17d51c308ef7bd4. 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/QZHN72264262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f04f1c298268a10b4ca6c6d83fed32f2a838103ec8639935cfa0c6dd1e3de4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZHN72264264.