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 0x16e07be2447d16b8eab0a92d2b0e39947273c81ce6eb7f17b9087da049055873. 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/7ee62430-e768-4db4-8e5e-965a215b32bc.json and https://artists.proofprofile.net/proofs/artist/7ee62430-e768-4db4-8e5e-965a215b32bc.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 0xdc4c01a34db90ad6804b97155903e6532f325935f4eafe11a2d87faa75f909be. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE29X1201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaac67f4b925e9db391f557388ccc050d1367aad053041e22c25fb79348afd6f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE29X1201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43c005b96aaee52aeb65fe96b5737427da5c2a3250efc2162659a234a66a009. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE29X1201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe746cc9d6b09022abd265389a3da353be37aa44572c40fbcfb4e129ec70c555. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:05Z), 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/SE29X1201108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35895aec52540f0c5057ce6329cb614d2364ada0d68140ed59c9a761e7e432bb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE29X1201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c6a232f726ee9e0fa82d4397454baddc222062dca3197f2329ee480b79a32e. 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/SE29X1201111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18063591e12f1ec36b478ed2fdfeb9ff9f110b45865bf104e8f307a364977df4. 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/SEVLE0301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a1a0b7b60a1caf9d8b4cb07160e9e3c9b1835d6a197b566c80ab0151bd2c57. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:18:04Z), 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/SEVLE0301803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6ff7ed247df40271bfdb5bc6c42c155153a7a8aebc2bf3cbab9be9ba032e86. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEVLE0301805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e63e84a8e14b805c853ee540a497e631a6ff4061550ffc39e77a68e44d0c8. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SEVLE0301806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66336d698c241ea18ecb34f1afc01c46bb7f9b041cfee181802ffe5ac2214927. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:39Z), 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/SEVLE0301808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281128f320d4974803f1e2a28eb6f74208b9110f8febb092e767f3f69e85a924. 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/SEVLE0301812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc4e2905883ca7b478a08940e6ecff22e01db67f588cb3c2c75d2fa725263e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SEVLE0301813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a91f3222b8f9e21afc0120de88767501aa25e777e5a51eccec29c4dac15227. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEVLE0301814.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f3754676691e1f40bc6149d76874c687033888d0e8f21e13558ea86c6763af. 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/SELAA0400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428f5cd664cb7b4ccfc05f65fef97cc03d3bdff745a7897094447efb2baf0a0f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEVGT1003409.
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