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 0x6b643ff493142ae579258e37895c57254cdee38c5b5292ad574cc4756b7a3cf9. 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/50cf3ed1-c48d-4e3c-897d-cec413981ce8.json and https://artists.proofprofile.net/proofs/artist/50cf3ed1-c48d-4e3c-897d-cec413981ce8.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 0xd0994bbb4cc527a1007e700c4bfebcaa96a3e9b3ec2ea9bcebbc12bb4f9e491e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/BEK011102339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2bfab2a97d4c39766271aefc9913eb654ac6b6760860f74653759d05b612e4. 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/BEK011102337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8bee84eb0ac3366ffc920c8aad1b94c657a0d9171679222bc053b8f0edcfb. 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/BEK011102333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb031f617b27f2e0059fd09af6d4803ebb96587f67c0b088f2c3b12c24469337. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BEK011202433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28028a9ad8d2dd62ba74e6169fb128a9ab402e226a0d878bf976b8eb57e8d378. 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/BEK011300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6195b124232062cb1a4009298f56f8c9a7e33f5c26168a9024ecf2316a523. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BEK011300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3b84ba2e0e8af269be50c30a572ff6cd6c9f1a6927d0e49996258e6f493581. 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/BEK011300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34556e3399da5435df0db8b18aaa18af759d6f4b4c8faddfe7af9f63ec8d1a2f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLUR61400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cc2370baea13db861fae9910cd03c3a7410d72d97c0e2e22419679b605c281. 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/BEK011600213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95ca9c5f3e518b6ebf9c388944741126bebcaf7f9c09928a0c58a032eb83446. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/BEK011800222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1346063a8b99155ab5db68295692ec1e53e4e70e63e98feda95bcf45f36ddf0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BEK011900388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f73f69f27e15ccead4033432483393b030bfe0482dc65dedf1c67b54529a96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BEK012000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c87b6e80694128f2e5ccbc0f65a693d9df6273ee3206d3072956fa95860e4a. 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/BE9HW2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d6d7136ba0c359f8a759c4a81d0f565def47fc908dc0a0d97f6522d1a240de. 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/BET222400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2472dc8490793c5d3d0db0ad8dbe6ae5632ae4e77bb82bb0a89301e1146bdf77. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLUR71800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acb20220f002f4e063a0e9a1555b6edf1f5b7e8a9eb8717f09d9ac875f5704d. 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/BEK011202535.