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 0xaf058fcdad5b1c02f5727a772ddfe30dc02a68463b6cec48be52a3feb341d27d. 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/614de860-eb50-4f6c-a057-c7ef1757ae7b.json and https://artists.proofprofile.net/proofs/artist/614de860-eb50-4f6c-a057-c7ef1757ae7b.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 0xb5cc84040250baa906e5b3b28f744f0d2fb3d451b655c5febf7c853ea74f758d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USMTG1304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab57ecf3ed6de6b2df799f5ba75909a2c23b4cb5b297f9659328f9844ba7705f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USMTG1304102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edeaeefa7739cc1fa1c5a009956676b1c2c57096ce2fa8115eb4e2c55c55907. 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/USMTG1304103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03daa98283c48dfbdedf3aad6460978a00bbdd86442a50f9dbd4a0c38353e756. 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/USMTG1304104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846bd11b0b346f2911fb9551c46a0e77cd79c0214820c6a902f42c0046e9bf75. 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/USMTG1304105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7efc9d34c7b8fbd24d1ed991fd60ccc757b3ee285e51f58e90ba119dfec7ca. 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/USMTG1304106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79469d5c3778bef044f0d8863fbdd6c770bc0330c75cb3c2b84e3538c5d8f682. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USMTG1304107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d56f41e464db4bd7e45d734c0c5c06dce1e42417f19092b9fae0ae5cdeb774. 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/USMTG1304108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86383e758dff341cf113a2943f8af9ca7b2d3cd2a552df0bd53fc966236e9d9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USMTG1304109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861c42286415259122cb19320da227597b35f0d36a11b81fcb24281451e0d98f. 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/USMTG1304110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dac37c364b01e62e6bff3447a627e316b836967393dd8ea9f00c2d6496ed2b. 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/USMTG1304111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016388ed778e5f7ec2b50ede8eb7dc0b10c7b415a071549b2d09789dad600991. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USMTG1504201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539715300c579d8f67494599abb4fd18f12895572974d70f825777935a9ed813. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USMTG1504204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa207b17c06ae6eceae83fcdb77985ee035ebb52800d4fe51f7143370feb56859. 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/USMTG1706502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc55e6d9f92f5fadca0bfeeb117dfadd9a2cf610d8f499bb739d83f86044fe2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USMTG1706505.
Those Pictures Mean A Whole Lot More These Days
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa66094973d3d5cbdf510da592761aa823b4aa43afea4d1c80e2913be242942a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USMTG2203251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067234f80cda4c097aff805a0a029e33a449bdd23f4a5105def7101877fe32b0. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USMTG2203253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aa824c8625a68cbbd7b9ce80cc94d84a7fe903f73d773dd889e5351a511d91. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USMTG2203255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7737c51ea400435f7a7c67bc51308d2ee7a9e74ff0f0b3a31843a1fafe487. 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/USMTG2203257.