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 0xe30ca04bc83641e46946104981ee2a075de61ec02d74deadf419a2e378297e90. 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/6e88d28b-c5d9-4bc8-882d-a0f8a20a923c.json and https://artists.proofprofile.net/proofs/artist/6e88d28b-c5d9-4bc8-882d-a0f8a20a923c.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 0x6c6509149cf6d1cdc6946987209689be5544dc5c4efc5de3abfc68f8d003cc4c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DEVY82000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ade2ffbda8ffea3af3f5dc221f97b63e84eb8271480e290c6661b9186bc2f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:54Z), 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/DEVY82000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae155c4abd2fbcf28e12db1464ae8be211356da6dd4f0a4ce12c89e700f369d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEVY82000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a7b07b9813575f415f2c6d5b8c8bc4e7f8287ca556184ddb474bdea627bba. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEVY82000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c35e9975af1d880362c9b3ab2fc815bb984822f2e6e6a8a1ab4b214c7d870c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:40Z), 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/DEVY82000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40f37a8e5967b7b357ad8fb38b7ae5c810709db29ab34007ee9214038e77187. 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/DEVY82000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c013541feb81d8c4c73e11288c4a3800c6728fedc1420157c7ae318b4f3554b. 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/DEBL61299891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64978c4d673872cce51455b985275e79b6c13cef207d7b8aa53b5f2c53ea5ad. 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/DEVY82000784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7684da23535fec36171a359b752be0b5fdadcbdb1d6b50e0908114f808147c8. 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/DEVY82000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5094653adaaad88ea4a612481d71ad16f5fd4c3146530a3cf7aab9598045851f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEBL61300718.
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 0x823d0422cd379ca9d910ba1ef047f1b69dc6caf07d35554aebb4ab762ab084d4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEVY82000629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d6dc2410d808a5c9c7de4f908a6068fbd674e77e5e96205a827049a16ee547. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEBL60693688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ae8ffc2d40b8018ec4b7623fd308461fd62a21b118e728bd515d01d6be4313. 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/DEVY82000782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471427babd3916ea7714c80d9ff9c33be51db3de139bb383a3d8b38a554be77b. 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/DEVY82000761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77a0567e5abd922c756c5b8301f79ef03b97b83f7e26a3784db5b46fca23d1b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEVY82000783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aacb2f3406b0792eb350e9fdb8643ff859ec55ea74697766ae4b50a1b13f9d4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEVY82000785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab91e8b190c2d1e8d68004b9b0ba68d6ef392c1116f3f98e0809a99c36fd73e. 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/DEVY82000786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fee4f76cd0144b8944da3560e03a7455d77b4f03d2952c067eb4f020492d16. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEVY82000787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b771c122ef4786b3494fcb5b441a1e03da3a5b94182f5a79d29abc888ea538c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEVY82000788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa4ddb3041411f9756844050be1a35e43fc17331b62d578930809d6e67480a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEVY82000789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06542c7388d33b4e0bb52931ec30b6007a9ab65d59af3e78f6b36ff8a077fcd5. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEVY82000790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc61c348d0ec7cc25a0caadd3146636f78dc822fec2f3242cf63f16bdc550176. 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/DEVY82000791.