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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bddc857cd7d30f541f7e888a60a40c0e8b2d78cc045364be3439ddb1458c19a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00cad2da-9c27-472b-86b2-1d68bc188459.json and https://artists.proofprofile.net/proofs/artist/00cad2da-9c27-472b-86b2-1d68bc188459.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8717e5e9575e6bb33307ae644a479c71e2e62dc2f6c4920bbeb80a9258abe3d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:50:57Z), 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/SEBLM9807020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed71873b4420b9c0ff6aadb7ea67c25af04c508a7bf609401f0a3bbba6a6662. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SEBLM9811070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2fba252d5ff9288269c9b619d47152d0b68febdc90819ac73246a9da435a0c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEBLM9811060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffec90ad0cc094194d9387812b0df6f359ed0fc5c27bf9834f62a04209ade61. 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/SEBLM9811090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a8497b372fd0d932f93722372448c1f1c096ea7c397178adbc59bf78ebd7e1. 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/SEBLM9811100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa69546fd39c078d67d9d85e4b7a70a5a78090de7e15b9832de0cb708dfb9da. 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/SEBLM9807019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367678cfaca515ad7a10f8aa9da33a7e6968fb630a148a499ae3e19756b2bd7a. 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/SEAYD0002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f761735c0ab8f9db12e84701b5caf418175bbef7e5be320caebff432306e203. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SEVMJ0800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f935c5a6c1841e24713121441552a2e7802fe69e770d6a0cba8679a759888f5. 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/SEPQA0900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f935c5a6c1841e24713121441552a2e7802fe69e770d6a0cba8679a759888f5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEPQA0900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e56a5940b9d0e8ff36d9dd583b2c8f9bfc6e5ddfb64bd712f0ab3f4f041966a. 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/SEBLM9808010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e56a5940b9d0e8ff36d9dd583b2c8f9bfc6e5ddfb64bd712f0ab3f4f041966a. 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/SEBLM9808010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bc50914dc52c9631a719df8b093d7b6abcaae0dab795ccba94787a6be2ab79. 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/DEMI62000551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707e90f99016a38b6851a610a990595c7e9e609e6911397e4e6399bbb18caeba. 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/DEMI62000495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b6288ff3f7ba2eb1396fddd099787b990bc4f6567c81bc8a9ea4d8f4e663bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEMI60200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc7d1797a484668428cdbf2f760c33c86aca89c123cdfcf95ef53595b42ee4c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DKBV71003901.
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