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 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 0xf588178fdba3f67732a8d4dab5093ace6e0b2bc05f3cc272e6e8605a1531d5db. 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/2c206c72-a7ed-4c38-9c1f-aff33576561d.json and https://artists.proofprofile.net/proofs/artist/2c206c72-a7ed-4c38-9c1f-aff33576561d.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 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 0x4efa8a8b2d44addff8f440b6307821bb22a406fe619617a0f7815c5583b956ed. 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/QM3DF2289066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165151cc4afca0bb8c8abfc07283a4adaa74f494e36c05e950ab6390ad4fcdd. 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/QM3DF2289067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcaec3ff91acb7faa9a80425bb4812042e81c31b7495174c15ee08223820f60. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2289068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdac52f29830e471c8cba815ebcc67b487bbb21fd33b532898dd83ed531dfcc7. 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/QM3DF2289069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a23957051adefcbaafe1c560644701221427437d8f8be598996d2cd769abf81. 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/QM3DF2289071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a9f3a3c02020327aaeafc8ec83e0cc482d1fe3a62142313ee82d0914e53c05. 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/QM3DF2289073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1047b87e5001de5b160910cc0ac99da07baf6fce828de81eea39b0f2eb958745. 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/QM3DF2289074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cf33d2cd47f857ce2c7d630fef96a70efaa7597907a12a37ec1a3f9a546b32. 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/QM3DF2289075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe5576979365665e5c53b8642d98cac7e3f0fa268810a0f7c53fba414c9946. 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/QM3DF2289076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1389b251becd513da400400d51270df862251b15c8829e18190db25a3dfc71. 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/QM3DF2289077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264cf0b66820c4b25034e5de531ee3b80e77842a1b9eaddcc441f7d87444bd4. 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/QM3DF2289078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8093232defeb102fb3145f91d8b64becaebdf0ceb10016c2420294f21af1ca2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2289079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b469bd4a14c0ec64bb756c78b8b3ec4304fb400ef8d107242e0a3565ba1776. 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/QM3DF2289082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77e5dc3a0afe54b0cfed733aa706885be62f883f8b341163cf7b8a1395ef48e. 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/US3DF2409531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee924c7094725bab0bcbd350e8f9fb347cd21f90b9f773091f89f0f802a2b81. 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/QZHN62418960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68a5225920e5f47934e93105b4008bffb75cf4517bae3ccf6551e158cd83c29. 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/QZHN62416532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01290917d054b4ad49775db05da9e1c98cfeedb01918637c40b329048fc11eb. 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/US3DF2416452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d9b1529cce31eab5a795c455a1641037eba10a8c8c2482cc41673d2682a592. 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/QZWFP2387395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ea6bc4ddc2f8550d25626029e8d99d0ead436cca3f2abaca536cfebfa889a. 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/QM3DF2257946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa093b317b6423b109faad2f004e354bb675730c7b508b01215e6147a121a9da9. 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/QM3DF2212213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ae8aa9e741891682f914c8c273233cf1057840c1eea821c7f01b33f1c14034. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:08:56Z), 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/QM42K2325570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10611348aed3356a4e09c0ac7c58469b0ade7b458eb57229d0bed718ddb436e0. 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/USANG2275933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf261c9320ffd0e6f3a5098f7d8a7f610fd9e9083951abce8c16120fa83d2157. 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/QM4TW2273958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9909b3364f15b154f244debdb0c108956417140c5ec0b1f6b32de882d64d4eb. 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/QMANG2242215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc10f5f9af1127e8d7e0451edc7dcc9c073530c9961f7167d407fa7abacb882b. 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/QMANG2242216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ec5ef599e6579134f74a6d3c5783eefb7e670387b115ca2d73f58f0822cafe. 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/QMANG2242218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92c7fdd42b037fc4d835d4680bd273ccc63b5b2f39514d9776905d0687d3785. 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/QMANG2242219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04afb1beb975f79241542305520ab0f8bf577a8d515bd375a5071ed129725a. 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/UKZGC2411360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3779f7ab1fba3a8786150d6aa0991f16fe954987a795cb6b14b266f19c48e996. 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/UKZGC2411359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa960272ace05ffd20e2a575f643f3013ebda0827e7076f1909c252f1211c59b3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:45:48Z), 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/UKZGC2411362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb04be27aac483cc944ecbaaff88cf61617d896058c39210bc9b37bfc984016. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UKZGC2411358.