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 0xcdd7bbd9c1ee4e2d5cb5d769937bcd9573aa47f194c2309b904942b9821ac1b2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/913fbe3d-a586-4208-976c-3a47b12a3f9a.json and https://artists.proofprofile.net/proofs/artist/913fbe3d-a586-4208-976c-3a47b12a3f9a.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 0x75e41063c3c15fd8a122ecf24a1fcf370623446f1c73096b06158d446849c15a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEQ121750950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b727843aa295e005e9ff30c064cbd09ee9d3a6d18ea7f2454e486ffc1a1f6a9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:19Z), 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/FR9Z61800173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5afb983f5f2bb8ed9fed89b4709f9c5fc6e58da00b4d8efabbb31d2ea6ada7f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ021806157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f3fe58e4ef915f1bee4d8dc23d91a2502a9afa3da116a3dc5bbc72c5307691. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ021806159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61139c6c04c3e576a91025191e3c5b3a388b99e1c32e69eeb6439b92d8e9cfcd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:44:31Z), 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/DEQ021806161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3716ba84c4e1b8d3e2fb008e78b38666e144ec011e21ed26600677b2a3d56845. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEQ021806170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56c7a5e0d53fcbd4b2dc4985d3ab4c8443e3cd41e78e7a6138bc642576894e9. 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/DEQ022100586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77eb5b285cee2de098a2ad311b184274aa194c9a112eabdf609b205825bd6d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZES62125848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8454918f82943e1d6956dfe7265299bd4dfa139ea3c163e57791b582db799585. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ022260390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee3e651fa75692dc5985d4833bdd294259d92c5cafb189f1fa64d0ee90e3c9. 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/USHM81723667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751d01f6319b367af80bdd9d16499a0af30c14bdca6c1b6e5de2c9a363fc6f55. 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/USHM81723677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d7464e0e97b3adf4113eada6dc9fd1f6ae0426d042d2f3b12b9498581a85cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1869129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6398ae4c5cdf80406391bb5d3000ad20e1def843dd8830b5f0e52798d20ef26. 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/FR9Z61700059.