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 0x0745708eb502481c210961db931d1ced0a718b10f51ae6ffeab67e7f86dc11c8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfc44ab4-25f9-4fe7-a4dd-43f1aaa945e9.json and https://artists.proofprofile.net/proofs/artist/cfc44ab4-25f9-4fe7-a4dd-43f1aaa945e9.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 0x59aa94531ad3ea2311c1bf2efef40b784d91cec88a5cbb1cd18053b6b5488441. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW562108893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47f95e7419c4721a0b1cdd6f78d5f53d4bfc260fbaba2eb9e7fe892d2ca6a2. 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/JPW562101397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad3c01a4c3caec657fd70362ba29f5085b5bb243492412b2047c683a8dc6d4a. 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/JPW562101400.
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 0xc1e75981df3c7bf39f97648625275a4d6283b9794134c952723b0abf016896c2. 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/JPW561904854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519cc71910b700641db05cf5ad2c61c6998477582621446f0dcc20d3ffab5a9b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW561904856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92ea7fb6d42790f54f77742eb1402c3aed2d7e70a43ac660c61e6535cf646ca. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW561904857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19820af30fc8a20a294ed46e556ede2e0af88236d8d7c9dbe13df63d10d67a8. 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/JPW561904859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd936dbfffccb9d0c25ebf93f99e6324c8d1334616b831edc332a288b9d80ff8c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW561904826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b83c375ca1a6ba113bd5f80e02497c7340149d156ca650e52330466fea3da2. 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/JPW561904827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4d4bea486c1b61eb70f463a79fb6e949377d15424c20628477738d3bf02e00. 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/JPW561904830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ae506a4bb3712f2c1d4c1569a4248104bbfb0cd42916fb87db980ee6aa86e8. 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/JPW561904804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98cb25d37abe2fa88f2215625bca84bc2432745062d156798de43ebd80fc3cd. 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/JPW561904807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8199e1d86bdcbb122d75008a6c8964267cf5ab236caa066bd7341b6288c84a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW561904808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5d147d25750132ae02c8d4a692209581360954966fe12581deab01373a8130. 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/JPW561904810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad270e55184eeb4a7a1987c61cb47d542d6d5bf5980c0c027a8869494c7c3c1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPW561904805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdaa210a3ec259efcf7a9fc615cdb7ff12c1143421bf787fc8502453507148b. 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/JPW561904806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ab6a574322f54dec83028e8ea21cfcbab0c1a785ca004cc4160eb9fa7e20db. 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/JPW561904786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cce7fdd8c2709d215427704052d217cea208a95f58caf173bbff9f2970eeee. 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/JPW561904789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472f427301c84fa9d5f41b046cf4f79353706670d56f5d62fc8eb6b02639f501. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPW561904790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afca4738a4e21123fe6c06194413bb0a8c625feaae7f693daa03e91e111b289. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPW561904788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196d4fba8006951d392e25b781ed41a4ebeedab9f29193c08cdaa1710b18cb29. 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/JPW561904736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedcf207f67c6c4c9ee586e9c2cc8dd62b6ea3f701add6f86f4fd4c11c224671. 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/JPW561904733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36751428a15322403e3554e3b84628a60dbf79dca5ef19c02beba1b4aac1f126. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPW561904900.