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 0x8c2ae1005195d223e0a8577935b96c647498f8a59886000ed7e22e29b757cd78. 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/ed544a82-a2a0-4703-8d96-73b2fde6c69e.json and https://artists.proofprofile.net/proofs/artist/ed544a82-a2a0-4703-8d96-73b2fde6c69e.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 0x6d46e2b96352fbcc35c365332ebd4b0a17a8aa9d998eed805ed2b4eaf9d02833. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAEF1978861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653d0022bf55f0d6ca0ac058cffa0e78e5926196d82e58270718acd587643653. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEM1990928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76752718ce16e35cf6514b4cf47cf269198c40ac189c9856bfa56a058d494236. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZNWV2274450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f71c59dedb50e5a2028d598e50523581c8189ed22541d8a4edfa8d70dd3268. 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/UKXN22317227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e62dc3f4b24240cb41759959bb1081a598a3d837afc32955a2219c62facbd2. 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/INS172310318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4d3738a67efb09c29e13f93650f73344ead4586d6f9eb67208282b95521e76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INH102407405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06317c3c36f65a657c6bb816c133ff9f246ab693e044e98e2addf6c0aec704f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZHN42077950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39b985b5dd783d5a4317043ab6cd48f85dd527df9af3383fd72920df2d20a60. 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/QZTAY2387078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfcfbedfea3121af220dde995bde09781ac9bc437da45df863361a508ca7ae2. 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/TCAGU2323438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b4307459470b1a19f2b494aff424f11b5fa012a39fd282d58f7642834644e. 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/TCAGU2323455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c8992acea54f25c2b5c6cfefc471d4ee2d72eb071193c06a5f6393d67a5a91. 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/TCAGU2323469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93570ae00c3d2ffbb5a98a277bc1c8af575132f5e5a20c959318a546bd0cd01. 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/TCAGU2323504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad3c6dd8f000d488568f13bb603b79f677752a200924926caca4dc9b30c5747. 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/TCAGU2323547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e8a703bcb997dbd33503af52543c750f3538ac97d0e137df23885774e5e020. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAGU2323568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb93af5bc0af8b0e6914eab51dc6a45f7457b763cf49c72f7909c032611bb6f1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAGU2323647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007aa22eee291ae793e8c97fdaeb9c77c7a06b03045abf80cba05f39595199a7. 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/TCAGU2323679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f7f76e9a0a377283c6b5ab73f55eb174eb2b14bc29e9d695c96e116e1db1ad. 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/TCAGU2323690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00275a8563f80f8f3fbd0e75713630b3a392ff22deb15ec7b18cb2da13b998d. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZES52293935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a5ed98f5d2c717be39b460c9377d8738c9fa27a3c4bacf4606d6738cd07529. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZES52293936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cb7400c3e0c1507dea312146db5724bae8794562c25ebf701afdf2106f2889. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZES52293939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe66a9bc7781459e082d165c3f8789804f046e7aa214479fb9d8335810bbfad. 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/QZES52293943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec4180520e7656897b1946709abbb0b091bb53c6549147503445c3410bf7e2. 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/TCAGP2294296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13f0aae81b89256694f3dcc08bdf98de91c81a08e786d8a9295cdecd1dcb41b. 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/TCAGK2281212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c4e7ead3a8e51557e6a4189fdc3fffd3507c205ea8072184a0354ef2686857. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCAFH2092778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b47b75b1910c8ffdccac599bb3d3b4294df977ff8388b6d3cdb4fd7fe24ea9. 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/TCAFH2092885.