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 0xa06d467a99147f0f55fbf7b1eb275b4275b7e54c0d71770637193bf466125703. 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/150c7849-5790-4ebf-86f1-1ccb666808cd.json and https://artists.proofprofile.net/proofs/artist/150c7849-5790-4ebf-86f1-1ccb666808cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Summertime Sadness (feat. Macy Kate Band)
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 0x97e32e2a2b8fcc4cc3b3bdc5f0b93fe72b65b1e392c982b8c68cf243d695171c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMEU31411742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73018b5c2e5edf36837b522e38451d1ac9135817cb3fbeb929ea38f44be3a3a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH1621265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bf5c20691a3ba5f5b3a8a1a08c278d34b12a83da63f4d09b410cc72172e744. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ1647459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487b0731d3188c38f3d06c48001b7038ab79b22f06f8d95891fe042b7f1eb0be. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMEZE1819610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa838ac6694f95e04a607d9b145037f09cd3095fe3aed09614279ba11301ded. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USUYG1289701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900e70f985d63c5a0a54399a633e2dffec098e46a886124983ccbd8ba8ee313e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USUYG1274748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa838ac6694f95e04a607d9b145037f09cd3095fe3aed09614279ba11301ded. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USUYG1289701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0361c5da32897d520bcc7fd9a7ce315c1617b130f28b3fb0ce374346c4a4dd2e. 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/USUYG1542218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba53f5c9db189c7493c8e3d1e5589fa404cd26fda3d05c2780cb7416be9bb49. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1574290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf66906edca10a39dd9381059e2e9bb92dfe5aaeb7e1ab5b7c9fe189afdb3c31. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USUYG1580836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2f1302a799ab7a210636e3bda8f1031f64f47db2ce558e574a9c14a073cfaf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USUYG1766176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105ead0b2d7cd61a0872f3ac30b510d1f57596d00486d5c932c6b6114c46177f. 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/GBDMT1700282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9786b2600d641ff8477f51493522a082517c918bae9321c893fcb4bde9b1f59b. 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/GBDMT1300929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d889769091bf6b4dacebd8f78368307c8cc5af3f31034f332e40062a41cad3. 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/GBDMT1500347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e80fc46de0f89241fcc0f691df579ad13768fa734730074bbb80e75c3cff2. 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/GBDMT1700346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e75a2b989b7852f048d155dda7c6dfe90d657ff842ef2c67f9fb310e13aa33. 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/GBDMT1301107.