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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 0xccfd15b6b7d36694795e9e1090dc9afc53550bd447e316e164b0b6f6efa99183. 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/6c8dc607-6d52-42ab-9508-f61590354244.json and https://artists.proofprofile.net/proofs/artist/6c8dc607-6d52-42ab-9508-f61590354244.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 0xbd8b77078d974e7fd21ff6e7e8811c75f67987fd0f584d0aca0b4c4947eae67b. 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/DEZC62336440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc971c7b3ba991fb701b4dbad7e519ec274992c57656e0f39e5513175b0bafc8a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62388669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca98ade7bc0dd644a0112a9d81440618f2ffec243a93b5feeffc3f05dbd1c58a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEZC62388653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c43e88789e96d12c08128f1fd1ba6d65a92d0d7f010169ec4de679dfd875a. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/DEZC62401074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16ac9cfd0d7260153cb225c9f5363daf56dfaa1a215dcbc3279182311da6244. 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/DEZC62432843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6387bc90a8cad543f9c704071d906967302feada15e50f8f69da7314e74b01. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DEZC62445119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73001a0238c998b7884ebbc42c8871bfb93ee5b7eb0d751326bb513e7924747c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DEZC62596923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e32794a0614654c3099b1dd586185271e82ce1f036b0912ae0f052404a31715. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEZC62500472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfab3b02335dfc398685ac89e6082b0d6eeb0db57d7fcea8a2e9a5b31212542. 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/DEZC62595587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00cc854cdee0cc1ba58cd2566bb08d6b845ee8311bc23d6b3e877cdd9bccaa8. 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/DEZC62500474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c23c87805fde56b3c0968cc450fe35764d121308c6910bf588b6d0ac0abba35. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62500475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c3ffe9244a3a78738da328b408469e333d6b9deec00069e5dd28a5aa99f2a9. 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/DEZC62500476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bb668f5ccdbfd0f37311971a23462365621ffd8485b7715e710136f717edb2. 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/DEZC62440235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edb44a2f6c70344d19491310eb867c05cbe8e0a09b9f5489c8599ac93091829. 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/DEZC62500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73001a0238c998b7884ebbc42c8871bfb93ee5b7eb0d751326bb513e7924747c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEZC62596923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d4c9c6609f76d12b87e0893551e59ca58ff042a06ef4a49b74c4f7f1c8d6be. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEZC62517484.