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 0xa81b0a31060efea196ef7cb73e49a1920ef431996ddea7c99dcab9c4e345c9ee. 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/ece670d2-992c-4e7d-9dbe-4b92aa6c4e4b.json and https://artists.proofprofile.net/proofs/artist/ece670d2-992c-4e7d-9dbe-4b92aa6c4e4b.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 0x01f459140ada95ac6c1eb9337a4a5dae9155f1690015ff740301588becde648a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPQ2131942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f53043108271fd071a1c35bd51218c37abd556869c9b98affbd2390b856f1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPQ2150689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225a234ba6bfcf6a69bd3952539c7367e446d695c8b7a32584b806f0f8566fd4. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/AUBEC2451769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0895a6d213c27f0af59fd8754df3ca5364ffdaf9b9c47c363bfad8472b8a42b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CA5KR2340618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dea399e9202e6e327979dc9b04fa33aca3d17dc2872291b17af23d9497f6c60. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUBEC2464282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697487e7d37c7ad23b14fea14a196e59d03a05f487bd75b7df6d25384d094b14. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUBEC2480620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090eb2a5b440274fee284ea8c3873bec5391184995e4ea04eab77b8e3aac6b78. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUBEC2510645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b1890abb1b08a5409633a18123802f54bef3faa7ba5bc5468c17212a61426. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUBEC2512270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed61fb6aa4937968d9d7f4c30d3b12a190c2a07b5c1891bfb98ab882b86abf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPD2549499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c15f328493216e5571d905df9bcfc1d83a5a6fd6d056e7043a4803d7e30305. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPD2588181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f0aedf20c59682c4c945bb5478f0edb07dd9cff4af348c08e5b53c206ac24. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/TCJPD2575502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747cba10024532f8f7c6bdcb1a24016ffeb2126f5c7b5d090701ceeae7b85c4f. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/AUBEC2559563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dba9a06f59ad89f4d9a215ed663d6d729f50483b38a734df67e5012305c463. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPS2282125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f0aedf20c59682c4c945bb5478f0edb07dd9cff4af348c08e5b53c206ac24. 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/TCJPD2575502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1becdae7bb871c23d3f352615dc95ef3d84cb6fb5328d95e5b070b2dfdbfa3e5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPI2589299.