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 0xc0bb4d8019de7975c11910cf4fa506dca915752112d16d7ff17482098ce5cc44. 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/826bc43f-8f2d-4f5e-b54e-5254e8b3bd20.json and https://artists.proofprofile.net/proofs/artist/826bc43f-8f2d-4f5e-b54e-5254e8b3bd20.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 0x6e6c229f4ab91fb6b58540251c8ebb29655382a09dd3bdc1e4e9b3108f23c16f. 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/JPZ921812049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d82e23e2f3f17e67df89e74482a4fbb06a3217e60e52a6bf964fb2a2cf7743. 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/JPZ921812050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cab7f9704539c4d0a5924df2e24f7280f99170e51a34dbc3b3fd1ece9453bc1. 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/JPZ921812052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79a05b0c887483e75c4f4ff2a5e1c0e9aa7a19fed6882a8e668ed7eba2f28cd. 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/JPZ921812053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee3de4c29daa7f8b2370e1930d0e89622916e0ce7a9f4003877d94c23af97de. 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/JPZ921812054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907d19e623e1a926a18b9af494a4d041ec5672d64437bec00e575e609e5be949. 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/JPZ921812056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e12fa1cb1cf9931be8c6c97617e8bef3572ecb8c55eca4aafb4e07151b63e1b. 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/JPZ921812057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616a7fe25951a134b3faff88b14ba1dc2167ff0257c209403171d8202c91e823. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPZ921409206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dcfa77bae2e4491b9e92ff25995c36a4482d2cfc11d31d92d38cda5497d0ba. 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/JPZ921409207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4b677288dcc99139a6891599863d2738cb026098bbe045536d887f21c1e4e5. 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/JPZ921409208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7659b24dc6d5e1d924573aa564307993a370b281f5e59490eeb2fb13b8c2c7ff. 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/JPZ921409209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644e30e09874070e9b714439c4ebeb00e751dd0c5a4d49766339f438713b6e9a. 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/JPZ921409210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd99161ec6587a4e91fb8844feeb5430e22723685ff1fe7a6f8fcfaadf166230. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPZ921409211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44c129dd57710430d7dd6c5620afca91b507474e58f15d48d672d914e000749. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/JPZ921812047.
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 0xb4b95f8d925ff63a242fa29fb5172a554139bca27d097c76f6cfbe249a279a81. 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/JPZ921812048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6f4f1eaf94dd4781328a412014f903867c795d60f5669953a091e1a973e609. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/JPZ921812051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a71b4e0d371ac4bfc9c68f805d50a34c28e28a5642a707576e0ffd4474e88c. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/JPZ921812055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393a87c305af112fc53d05a114f6aa17a7f26dc1f6715724cecb075f53637f8. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/JPZ921812058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3a54d51adb71e2dc9cb4c3766f74d54171916bdbe37ac7945df434767c0e33. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/JPZ921812059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e536849abfdf13b8a06490cc47b5beaa6b03399546e542654ddcd57ac3f349. 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/JPZ921409212.