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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 0x498627f6a84183cb0af8dab62de895b716c1279daeead183ffd9a9a86bb44bc6. 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/04dbe62e-9796-4d5a-a4ea-b4b6aaaab57c.json and https://artists.proofprofile.net/proofs/artist/04dbe62e-9796-4d5a-a4ea-b4b6aaaab57c.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 0x8d3f04378f41aecc82118e4ede6734efcc9d6b043c9fa09f6be32cbc3a1d719d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ85M1991085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3617386bb516211d203fa24178a78135d543843e311ca8af75e474057adc3a. 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/QZ85M1991087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bba59dec2e7589dcba928778cdea83bb7fa049cdd3165bf5fa997dc41a15f5. 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/QZ85M1991088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2e6365b5abaf0258886fc193b26c7b68579fda4d1f83c13b408adcd4efeb0a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ85M1991089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecbebf06f52bd9c3f1d8e4934d4f77ab3dc0de68367e8d47f8298f05bf71f51. 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/QZ85M1991091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2503ad24346511a880dc90888b16681c0d04f15244e7d256184c680db8fcae92. 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/QZ85M1913216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc428cc2b2c6f448fd351665d5bc136e42eebd3ab4f68d7927d261943b3cdd8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ85M1700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2361c64af35acd9cdf6fc8fd27fb36bb41fe058be0fcfe1da7c1a01029ee64. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ8LD1781082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485b74650419ca4e9c856ab3d2a4d13494a0da56fe113f9bd7943c909ff0c4c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ8LD1783255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b62486989594966069a2480ade4a09ba2e4c4c15d91e376977c0baaeb77c6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UST8K1665061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a579115bd9ce45a3bc6ffe89e42e2e2a9b27325a2f61230efbfea427241aea. 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/GBDMT1500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0500686a0a93126bd3ef30358890652f04e01bf8027f82c78e5c31b15986e7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCACC1449685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ac7a158043d2752bcf7a27e18af89d628c4375a3b4db2865151dbe33e3068d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACC1449688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c84fefc2a3ae945d388f5198031e953cb6505b3e47f04479a890635a1a8566. 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/TCACB1429931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb8d77ad0a632b447db011e631b7f909dd722ef9668f1923da47794c622c82a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBDMT1400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2de10a4c6bd22b94389de32812ca98b3f5a196e56c09953cc5c2d56d6603e5b. 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/GBDMT1301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa663b642d4f0b2dd8be31c5b55fdccd8767aa0503261c186f6b10e55035d434b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBDMT1300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b57b2e67110ce7aef5c7a047ced76e27d4481626637a34c83ddb6257b8a8af0. 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/GBDMT1300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411cb22340d6e23be62c4c17e0f5f9c38f96b632573ce2b373f3b07342be8fd7. 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/GBDMT1300900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429b5b7b6f19c35a17634ed5db18956d9bd0129492930cba5df5e2cd165d23b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBDMT1300867.