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 0x5f5a7939a8da2d74089c1fee7e24199b992b98c7e9da6096c07c771ba675f081. 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/b8419099-afbc-4590-b705-471d5d335ab3.json and https://artists.proofprofile.net/proofs/artist/b8419099-afbc-4590-b705-471d5d335ab3.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 0xaede3297ca1abc2bb53f3b0beb84f345d4234ecd47bac13688b7fc792c3b9ccf. 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/TCAHC2397593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89603b12185beb6e842e650a7a20bd5c41136ecd092c6894b313baeac3476d5. 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/TCAHC2397618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dcaab0e4feaa233d7474c4c2b2f29987ede27d5cbfeb9fa6cb990b1fab7c35. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHC2397638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655338b76fe78b3765bdf200ead12cc3d648d9af8540657ccc601c87a2f5ac4f. 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/TCAHC2397642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c0cea86003c4e1cf3724c9c27ffc8cf7a57413a31c0e7654364f4608d060f. 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/TCAHC2397661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8c627974fb9ec76b6415760e3508ba23aad27f1d4fcdb21ec02279bf72151b. 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/TCAHC2397665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d6ee80ee473943bf2cfde8d62a38b291369b24f719a7d2b2c6224a5cc6186. 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/TCAHC2397712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ccb91b5396abb528dad8fe1b5e7bc6010a1316a38dd37baea5248033a92b9a. 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/TCAHC2397733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf81d4f19c1f7800610acb8095948ff7ca822eb7ebda853db5a60c7cc77fe492. 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/QZTB32453469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0eba45a8b3d991ee5582e2e6f037f925a0089b7284312c92939649d31ab08c7. 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/QZNWS2440857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa522be49059e9461a192f331d8120402a7e3803aeba74624253e8054845a4a54. 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/QZHN52496314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba252864821ba22f41bc6fcfc7723ba6702c1be689a9891b54f04ea20338106. 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/QZFYZ2485937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c0b36e3597129205546c2d33be0a26946c17551a0a2594aedc185ad38bb11. 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/QZWFN2336646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf81098a495008b745785ffd10dc50d55227a07072a72b75cdc7fe0e5bbf2a90. 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/QZTBA2397744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f82644586cd216e9cf370ea5db3d96175fc33358f363a3951afbe4c6d76204b. 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/QZNWU2344333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ccaac5e095a05b019540717f81eb8b66c1ca728e4b01f7c9b18dba68d1346c. 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/TCAFQ2163771.
Vaba Raha (Original Motion Picture Soundtrack)