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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 0x9a6ccc1f03e3709c6ac028251f0a1c44d1ce97c57aca8907f4a947d85c8b8f0e. 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/b70f8af3-47ff-4ed1-a315-63ab3b732500.json and https://artists.proofprofile.net/proofs/artist/b70f8af3-47ff-4ed1-a315-63ab3b732500.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 0x534611ccadf6705dfc35dda0462a1a0cd6e64a59a35b3fe6b607ec4429aacf91. 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/GBPS81513088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b78bc2c58cf47e7e651d6625c704f6981b82e949457da60bdccc473e11b50db. 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/GBPS81513057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252244f3a568489bf40e3ad63811b92fc3ddb8065963e981319cbc1484d0a38. 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/GBPS81500629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b348e6127eefb1819dc5bbee3355517b4429e722bab0f0c90e0ec4713eee7. 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/GBPS81500684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76e36ade68602ec461855af4f3af532315c94b4aaff3ad893b3e1d5f9deff33. 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/GBPS81513051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e2f5a239386c2009d07ec47ca25beb9bc68168aba63e45b63b4a9690b642fb. 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/GBPS81500661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83effd9f35a4ffbf8b85f5b423f50336b0afdbaa9551aeafec2d312b4ede6a1. 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/GBPS81500632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255f2ada1bd2bd31908ced26fb124b1306a50ce197a6d841d0707ddad5dafa94. 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/GBPS81500690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc02eea1250a6227375105695a373282ead495f3f8ef53b48bf0e092b705031f. 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/GBPS81500669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fae26160bd348f6a8185fd7e005a462ea381e030abd856695515fa0a11d5254. 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/GBPS81513046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb067023f694fc4d1df91c582960c55a0dbeb51791bfd14adff6913a372315578. 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/GBPS81513118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0520607d2b2e3124783ea977f8183e7275c69e43d2554f0155abd6285acb8c4. 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/GBPS81513082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860c1076accdbead5b8b8d9d67b343ced151a8591cc554c29371c1afd730662b. 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/GBPS81513108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8461b3800799ebf19447ea710e8e678c0412327642294d4af687ef37919f025f. 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/GBPS81513076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65c4c8bb9625f9ec6fc970c7f3e7cade96bfe30acb21d4cc0a2a07cd1f4996. 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/GBPS81513060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f3854bc4fdf415795db15a02c797b2b29ec71bcfaaac299e65447dd6bf335d. 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/GBPS81513101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3832156f07fe21d751e486cf6af610cddab49049debc6302dbeb3433c138f6. 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/GBPS81513063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b1c3ea2d1a184d8dc4c6722ac4fab37d37505d36364ba04af993e337c118e9. 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/GBPS81513068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65c4c8bb9625f9ec6fc970c7f3e7cade96bfe30acb21d4cc0a2a07cd1f4996. 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/GBPS81513060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22acb86109567d147919acfe4ef27cd58c3916f5071358de91d3be63d008fa0. 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/GBPS81513097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda668b3fc3a6a3f9df18af7d59315c51d6122eca76a547f52106bbb1250b7b1. 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/GBPS81513109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17e3115b447512085799a3ef2b72215bbdfd99cda7c089242f1bccde7e015b1. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US5UL1250562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa401df83e378c9acc8dbd572ab57fc233cf6dd8ce7a276a19ca5b725d8188c1. 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/USHM82496854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350c21e934c29b17b06bbdaa2501e4f0eabffdee553d9a381a85f22640afc4b6. 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/USHM82496856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82b97613299c2cc971f52d739b7b6d84416062c7c122c96d120f41e61aacfc7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USHM82496855.
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