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 0x9bb611b5fdcc815e24225ab5e96ed1019077f1b47832caa48a7ea1debbb31f98. 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/46d42785-bb2a-43ba-8aa8-b551af1ed232.json and https://artists.proofprofile.net/proofs/artist/46d42785-bb2a-43ba-8aa8-b551af1ed232.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 0xaacdfeeb23e1822fdfd997d2b317925df5c65e83b258b77cbcd7abd47bb0fac4. 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/TCAIM2459531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4a85a811609ddd368faea6f2c0794bca5641eb6fc3d949a075d95911c61715. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCAIM2459579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb650beedd44dfc6673c04a1736139f92c592f6979d705f512efffa00b3b924. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAIN2448928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133f5525f59143b7ff54ac495fb939d41165fcb92404b1cdd9c24e82a9818785. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCAIM2448940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc618b705aa366f6eacaae769dcb92067ab7523644edf718167eaebd0ebae7447. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAIM2448849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af53391ecf48971c3ed2ebd8c17656afc00da74a2719638c1f211efe34dfc0. 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/TCAIN2448854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4313439abd8426f776d3b8cbc07cc98fa234d266a1a9d18d701d9b5cecea77. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIM2448018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb916337bb1dd8c161b5bbb03c60f7782af06cc6ecf4b4683b5a5f8d65bdf222a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAIN2448023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f096341695b0a58f5a82bc9e6ea43957003e77a424bd4ce6aa78852b4e356. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIM2447630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770d216e56b682e1e393ca966be24fa441dbe7a58eff62317ad823748800958c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIM2447643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc008ea76e1ef43cc4c867c0a7ba4ebf5f24c498462e8d95f69907ef901140643. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAIN2447648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b2450c6ba7316a92a3b89697763739d2dd12e257b54bcb799d6a640afc9f9a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAIM2447652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8e031ee3d6fd82550f12bd4ac82d0caa5496e0d50c2b206213c119401beaf0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAIM2447665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc566e104d431ad8962a6c5abf75c7038216e0ae18cb729b5d273ed87acb80863. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJR2535944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b2393b7d95b891ed17b75761aadc89cd3c62b21e52fed7ce4f11f751863ceb. 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/TCAJR2535958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509610e86f46fe559fd23b255880469114ee468b719e645537a0d157772392d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJR2535972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fa7ed627fe3f2fdd0b205bbb9687284e61055e540c170120801f79a21bbdae. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAJR2535992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5847b2dc2443fdf78bedf3cdd413ed669b814a5639d853a7460dbce3f52bd664. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAJS2536001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6e29f6c756a3ea2090cf2cce23f176c682ec36e47aa5ac63c4aedbd3910475. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAJS2536018.