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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 0xa7f2772189198bb7d4e6f1e7ef1b3d11123c4a49decd331c2588081a08eddb1c. 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/dc754485-9c8f-4362-9121-a54ca87367f0.json and https://artists.proofprofile.net/proofs/artist/dc754485-9c8f-4362-9121-a54ca87367f0.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 0x743d9de6ba301013e3af1ceab45350c3eeae9b45f9dbb2ad931b4c169010d035. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/BET851200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa329747c2bf713732248b05528e66a7ef6429cef359822eff4e5f0e8ac8c33fd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:30:24Z), 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/BET851200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b5cc34fcb51f521a9d5bd00ea750c141e4134738e7562f67284749abd2623. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BET851600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1bb4f71028aaf4a49ce832a8cbc10c07ea99c5751244a9e7c1ca250f232210. 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/BET851500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3747d9a1d2e45eb181434fea2fc192c361d0a0373a495d796949226f2c967c8a. 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/BET851500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987288fbe2e68a7003e4e02da0fe5703453855cfcc9f5bd298f0ac18dfc9eabb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:19:25Z), 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/BET851800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8267ad64693a4855cb4449c004709f06a75ff4459d35c1ce49c33556a2d05020. 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/BET852100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa7f533b6c900f1bf6347fa380de0d6738c155a91c62e6521c540fc7fca077a. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/BET852100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620eff5305a1962d017c7eb419eea174d6c0f5565ccc0ed32d37c7b130cede60. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/BET852100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8f36460cb23cccb5d11accf3a864fc36ca9b189415229298651b955f0a5e20. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BET852100012.