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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 0x35c6955c681e6eb07f9c430400802dea1b6e85b2b7c0aa436946dc87bfc09a86. 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/ec7ac252-9d62-463d-ac95-692f6f6d5f43.json and https://artists.proofprofile.net/proofs/artist/ec7ac252-9d62-463d-ac95-692f6f6d5f43.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 0x9431c6a3402c14daaa7ce9437ef7bbe11e1be7e321fe39b85049f307b28aaee1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRX762051515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a90094db725568c734e915e77b7e814dd05036fe200a924477b000ec1ad76b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX762034551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361519b9aa2f0e0a7927ec8846b474889e044a9951bd26fb6cea97c324059fc2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DGA062248443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cecba3c4165d2d24c08b6e90dd9bec77f62985b1a9d69de68884d4baea4021. 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/FRX762048286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b5991187b0dd0b97536a73a7a3ef4519d7c442362a878bea691e57c6515c2. 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/DGA062289533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7df5e934b06ec04054b94a0a165530ccf8eda6b5760bacee84c33697798344. 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/DGA072250470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6594dd05f35d6e06f097c05e973c6c860cd046560e1c9a84f780fca784db4e1e. 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/DGA062070507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb350f6ea6ea72ca50851d478761e62a9932ed53271b6b56ce0277a832103b17a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA062070506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bc4636958fb6ffbfef201e053f5232a115b59837d6cacccb04ef283b8ad18b. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/FRX762051516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88d975d3ec63547c278bdc76c99fc42415e1723893bee577e8038185139fb3f. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/IDAC52003216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0b718ca6b01d673ae26a15fbf3a4bc70bf73d4237a6a9ae0599903b3ae0d17. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDAC52003217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d442eba2a7eb097c0faf407e4ec38ab84c4b95c32333df495a5193c23ce650. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/IDAC52003218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17121c3cc9fb6bacbdd401ba9329658a905f86ea51aaec423a472c0904150f9. 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/IDAC52003219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd6fe338d9c203f2f46fb4bbbeed202a744478b1fd941bddf7fb5c300451bc3. 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/IDA401602749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cf3e682b73f6ae751803f4916c5a92f4693bcc3b621a61c723829aa28ce8c2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IDAC50700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dad72d662349f9b831cad75aea6a4f081718f53f43ddfdfd6a9ed30fe79ce4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/IDAC50700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46496ab5c1e027c2be67ce5e9f6be7db7d2b24f53e8e9830a24e38e7f18ef3ff. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/IDAC50700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8132d9b272d4c7c557b25bba97fdcc4674d7e9a74c08449dab06516b786d4636. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FRX762027500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82008e9748c57addb2f4ff01859ca16db1d300f780c7f271a547face931f1a73. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX762034564.
Merajut Nusantara (Sasmita Pandita Mayapada)