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 0xbe1d15272010abce4f4d6c3ed04fccaa4abdec9f753ad3e7c335aba6957c9168. 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/48d55f6e-73bf-44be-aa1e-4727ef636469.json and https://artists.proofprofile.net/proofs/artist/48d55f6e-73bf-44be-aa1e-4727ef636469.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 0x242a746b53f5723b70ff78f0b140337be45ad01443643384d15f2176e24cfddc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES61967589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8a3d7adf656624b4909cc6e24025414eec1298e9a948e675a16a9f73dbfeba. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZES61967590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a110ad974d8e247a5cc7ba6e18d507df48d092f5ebf34383b3ad574054fccd1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES61967592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4647630b0e88fe7a4f049de8c008dbb8824718cefef5c31546e68f1b6c3aca36. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES61969814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c60c12d638396e04f4a82fab45f07eb29d025adbd0516721b24afc3b066e731. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA42028126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c920d6733b30e18d14d283ccef6f69335b9ac6b056ca7afcd4cd337495d2c30. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZDA42028127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec76a54563a5aa035ce04721eaaeab36c301be6afe71ddcf057a101f9d36b9c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZDA42028128.
Plastic Toy / Vyvanse Lands (Noah's Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05985b67344211188b984319bb506989dbd0d3d409a18a1375d715e456f9d033. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZDA42028130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10510246fcfd50843d2318729f63be7ddefc948f78b9eac38d4d29bc000b06d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA42028132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5a120bf8199c3e3f06dc22d215f7bdbcb28797e078df583f5840377efb46d3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWT2080674.
Songs from Plastic Toy (Previously Unreleased)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efce76653f8535119cc9632139deed3819210ce8a8f76be47f154f39cb185e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USA2Z2400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc62449e53d0132a699a4c0b49e55bff9f527f2b3976c5de2f75f5df39d6f91. 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/USA2Z2400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d176f34f0d619fbb36a59e3db6cb5fd39884bd8c063f0305769c6136f29920f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2Z2400851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950ff3570b13002d5ee37f458d6b32dc8f4dc044a56a46dabfbc6ec39675b4a1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USA2Z2400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0546962c2b1d6934704884996d41f1d219a246deddf9968f346f0d3a0cf530. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA2Z2400853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e2d5e13394abc97cf9dd7fd2984a4f931c3bfa7546ea110253598c76411d87. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA2Z2400855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe67289224cad459f2ed2b2e1179bbf4b51a1241bb33e59bca40bca43defebc2. 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/GBMYF2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406dd325aa50861d4b981ba12bd0b1fe2f78f51f052693a2625e98fa441f4ab. 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/USRC12400887.