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 0x82bcc142ebbfcd447db4f653d8713bdbcaf0ba7d1c6d0ef064bfbe7fff5c3ee4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca446ad3-9195-4539-83b3-e5e0b083b7d3.json and https://artists.proofprofile.net/proofs/artist/ca446ad3-9195-4539-83b3-e5e0b083b7d3.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 0x60226ed98afe595f3de0a5a3567308bad2ad631490ae3c692fd137825c1179a9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKXN22589736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa666fbdddc124b324ea30a2b40939f82e2fe10f8635f5b306c383708c6173b6a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/UKXN22589734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dfa6d0088e261d4c068609d6c9a4ee821be6899d441e2b8684be958bda683a. 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/UKXN22589737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92f3697ff5cabce7a45fc85c73de6f5025e4ed472bc55788c025fca2f2e2b77. 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/UKXN22589738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aa3e310ca31100a4eb3d76afc79a5e3ba33d4d0613ec5489a9c2177bf92da3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22589741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d32162f754aedbea00eeeb1b89c5bea4f82aa829b3d0cb4fbe3ecf967f28ce6. 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/UKXN22589742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b16ce43ef66d6b3548b551356e521b02fdbb99ede3b46a8fd5625f06f5fcb2. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/UKXN22589735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2076a1106d1c0e181901aab06a94aa74f7303138abbc11c96dda71362324324d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22589747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a069f52da4b636e37abdef8f941ad222e274f5013d8f43d8337f1380480812. 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/UKXN22589739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb13526f1603ba8293cb11bc4487970209b6c39f8b50bc2e4474977f12ada020. 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/UKXN22589743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5c80a647762d8ffdbe4266af7fe2306fe6517da795625d0c16cacd39ba80cb. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/UKXN22589744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0545d1c1155aa59cf17fbd80342b8680fee247b2ca9a2cbc09ef9a847a206af7. 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/UKXN22589740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa6e27726630695de0ba24fd1b196b7fce9130736c3147c7f3793d58e971ed8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/UKXN22589745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0315d7ecf25904c8abed89463c357469092d412977c9041725938d7775ca4f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/UKXN22589749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b69010fc28510712f49ec7a997ba69280425a5110e1300fdd01be15abe62ef. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UKXN22589746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188af41f08cebe8fe579c17fd386fda5f99821f3f923fcb323da717a336acd25. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/UKXN22589748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bdab3c6b206560465be7eee02f960c7944c5023375521ce0fcf189f3832646. 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/UKXN22589754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8b18a792ae765138d5c92c044d054baebf241a3af92b076429a67c3c52ea9a. 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/UKXN22589750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a7aa497e7953999e3e1c284699190812bef5e9a2d3e8846ba8f205717d682. 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/UKXN22589752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae9e377a43e905d92fd04d1f3ee6e8e1be8942955689229f936b4584a8114ff. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/UKXN22589751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3505ac13db8e0d853f7b0d3918b70235c41d92100ee1b24585411ca1230000b. 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/UKXN22589753.