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 0x27e779c6b3775858f1cde46f7fcd2d43c063c4297db6956472cdfe0d942c4b6e. 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/413b47c9-3819-4bed-807d-0c83ab3c33f4.json and https://artists.proofprofile.net/proofs/artist/413b47c9-3819-4bed-807d-0c83ab3c33f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Embong Rahardjo, Vol. 2: FirmanMu (Instrumental)
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 0x7c12894658f24213828b01d69217ce1dfc6207f284a24b6b46578b6de2fe136e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA141402533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063e2ff36ac9f02f6f4b954df63758124c4452ded45022f1ad3bfb7e1dd82f28. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:38Z), 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/IDA141402673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f14c7d0fb7568a07f92e821b78f11a1a06bbc3b35d97b64aa7bc93dc460f4d. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/IDA141402525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe066f147c9fb887d7979ede5d0a37df25cef7d97c8a1495ee124524a62bb1309. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDA141402527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d055ce457693b928cbc750b365e67f0119176b1afc16063c598c460ba388a02. 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/IDA141402530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264236831ef185d4faa46844c71f678c9d797e92642a4f927027fea6262f512a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDA141402531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf620764ad842bbf64feda4004b080826a6e3ceeefdd2f07b2080cf780af984a2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDA141402532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92413776ac839dd5d43ee105e17515d91466649c14481a5fbb10e79425a58ca3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/IDA141701238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d5cc0108e7f1010f4dfcf89c1b92008cc86cca345647fd509808910545a5b9. 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/IDA141701242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2da5012e5b0cd10682dfba0533c2869eef359838bdcb35acaeba24c600519. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/IDA141701245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba46544220322b03837881630fbac21c73483ed8d2c9f67f6f67decaeeefb07. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IDA141701750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5366d6d1a717a41f51c09dac5e474bcda75851967538d32eedf2fbc40cc65d1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/IDA141701752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceab773e2d51874bcaac9d148082f0bd7887978ca943e34972d9a865167a60b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/IDA141701753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bedbf61095ab52cda657e2ad43c0b9ae5102453890bd94198c15a03e08933f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/IDA141701756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40339bbbd2ff5fa51f2c50a64b6d5388e0b01557201f0a571e159b1391ef7355. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/IDA141701757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f3b5b51e7a7cb2bc332209d56c6da610d8dad1e4abfe53756582e668ee1421. 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/IDA141701758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522422b217523891eaf954e41d383d8fd2f6ed36ad21ca791a6710728e2414de. 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/IDA141701759.