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 0x3d2212db73f849e675be2fddbd4920e1f6485976f889c75e3366055272694f7a. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc4e4870-a50e-4568-a28a-d1ffea143758.json and https://artists.proofprofile.net/proofs/artist/bc4e4870-a50e-4568-a28a-d1ffea143758.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 0xb66a8071ebde3a110ba420665182b519bd19e325173db6dc414c6c7056f8fb2a. 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/FRQ032316701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27c6a3b5509b306dd2b5240eadc51fed9faeb43e85c0f6962bae686868a1a89. 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/FRQ032316702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55869281917710e7dfd00030abfc702289f5f2962cd759b0ad9b0a5c08a4fbf8. 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/FRQ032316703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e581d18e69adf2f1c7b9d9ef0dd2567930c1366fd5af2313a574334fbc011af. 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/FRQ032316706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b10784cc6d1798b23ebaae7d3e0726b3309ef9645dd5a10a4c506c093c3c8a2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FRQ032316704.
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 0xef370b83596c48a0ed25ca0d59568b69d5d828f1e51e0a340639ffd30dfa501e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRQ032316705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd414a93515bb7df955195e458e571d7ea91405c7965faa2e7609546a534a7029. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRQ032316707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dabba82485c0a01193dbfcb8bae11828a64d6f33850c505a60df3b06de28f0. 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/FRQ032316708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e04248dfae45864079b9d7fb652fcc554016621f9351234951ba5d09a369aa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRQ032316709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8341ec81bca11dcd756cfcb4d199043936e76013dacf0b102e5c5b2eae7ac7c. 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/FRQ031814901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5484c51bc12604b1afe129f2a92de0ef6fe2038a8809cf0edf4975c27e1c554f. 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/FRQ031814902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c8872f6a37819077088934e0cb996ac07d7a04759d41e09794ba8c8ea890db. 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/FRQ031814903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8d5909d65cbd0421ec3469d5cf0fe354a9929da50b28d5e2b4f7f632d0ebfc. 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/FRQ031814905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f729ff101c3168efca3f4045e0618c14096ca9fdd5b482134bb311350d96f1. 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/FRQ031814907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5161ba9375bbc26b41a9a4f7ad5c9b0dbbea16a71a2c18d1ffc42a8a654e4b0. 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/FRQ031814908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd63648fca1b88480ebbffdea2a7650836b359b9cf53e23478f8aea3a04bb3cc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRQ031814904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f18a38aa6910691d8de7bdb1a66713e861721d0353f445a86c48df65612d435. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRQ031814906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e5d28be13a167c258382d444c7bec0a5567003d176c73722b6ec7c37dd626. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRQ031814909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba95af5ed06a35e119d260ddbbfae6034d9437a45dcf2693eacd93ccded4cf78. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRQ031814911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd0d83ba68ac64b2bb653f34c3ccffa600fe3a6c8e7edf92ccdf9f4c43a9ff. 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/BEDS71601003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356646dd0df4cec4754026a1af636b8167d04e5c4a5e1f2ff8f74166f6243c6e. 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/BEDS71601005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563ecf927e8a3fa49b68b5a93bcdf4549c779c2ab51404f37d10417f0fa6ade1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BEDS71601001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689bad47bb0d7dc994db4cee37607b54a81eb7e7b36700ed1b88b0f4c6b8b426. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BEDS71601007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33442115054574125c91bbe13dc0ed4fd84fbd9d1e5e6d8d9e6ade65d3c1209. 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/FR6V82483732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9184cd7401030ce087a52aa33407aec5ce5f92de6dbc8e2741c94b25cecafde7. 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/FR6V82483735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0648809df0eb16da09c87396bc63dc5dbd49fa21ac62545752da95574fef75d. 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/FRQ032216401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5120c9b10385e0f240a91e5eea0aa313d3ea8abf9e7d995e7cb6ddc1ef4255b8. 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/FRQ032216402.