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 0x4522f7a19286730afb7048f299efed10d669fca0af63ee6cb2e5de1d630fd42a. 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/c03c6367-122b-49ed-aa95-f36a16c2d878.json and https://artists.proofprofile.net/proofs/artist/c03c6367-122b-49ed-aa95-f36a16c2d878.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d55e04290748c560acdba942a32d07f82794b5cb9f6b8636c43d6655719dadf. 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/NLS6R1874028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ba9517129e053201a707afbcf0d125dd18746e0248cddaa4ab0b21f6f10ab4. 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/CA5KR2068270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65a9f7c19043bc6787b87d3852c5bd45eb0b8bde3b7b5fe2752538ceda926c1. 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/CA5KR2068272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ff689c2932d028bdad1368e86d4779e53d7cf6c7486fee9380a7a20e03732. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR2068271.
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 0x484aca579359427ccccaeda072aea06616a6a6512191c02c3654137daa4a4aab. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/NLS6R1884141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4624bcbfe4de2297840743f386255cdeb6c7a9cf4856032e405c79afd564701f. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/SE3OH1738691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc956019e45f89f8157e1f81f6b61453a4be077d8e6c908ddd4cec47afcbe0142. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE3OH1738692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa9cbf9f15749c69d9d16031eeaf28e221b8ff3606fe0cf905aebf7e31a374b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGQ2292167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce7e2e8ec4c61b5989fae1db95eaf6598b359e19cda2a9fe3c3f2eb454618c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHC2324607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eba0bceddc6836c1259ce7bc9277f7e4fdf41f734e890775afb680aaf0d1c0e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:10Z), 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/TCAHG2327430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1197b3194d0556f64305586d72a30a0fef118de53aae7e5440970730003a7356. 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/TCAHM2369559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3813429bde70f908941ed4db72b7537135a7347570542a3c309c25804f0fb88f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHZ2408331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fb08fdfa53fad684e24890bb132ba82c170f11e4c60b0ab460856a774b1035. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAIA2492908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46814fc9f415bee4df8487a6d9adbfead2223260998e452884a8b0e7279e28e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIB2497657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970413ced3e51166c814794fa983d17c1b20b0a66fa0930ffcdd16023413e7a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAII2473286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ffa7cd15f67f6580ce99e4ce26e3770e7a5cd36685ba1074f41a5be03ca230. 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/TCAIX2411819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6984c455138a98c18fd1c4efd352685c590eec8856dcfdb7bc5e9e2a5f7160b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:30:26Z), 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/TCAIV2434907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4da41434bd76db7474ab172a4cacb09ecec569038370f9145243aa6d360b4d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:54Z), 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/TCAIX2421049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e403bc6cd667469056b5953c5ff2b0a567913d06fe62e9a7783536a9120572. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIY2478091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe559842bd446e153ddda67f31253c4559aaa59e7510aee49d153dd0af7c65f5a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJC2434496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0e92b88200cfafbd1c6229a9422bbe6e624314cd6184e35fab7b7bf2e62fcb. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAJE2504676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927e31fb0611c952312b833a3bf91a74050085ea2ada7f7129ec04ca1c851ce8. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJE2541961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153a2d1c0b4a6aea548d7738d8ef757c41a4ab5f2120d2913e5c0646090c30dd. 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/TCAJF2510121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653b6e696b5382b98729b0ce4cb9a4f55d1b82bbfe0891eb692e94588fd9aced. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAJF2576248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88a6c82b01d5c0e8d367f3603baec46ea325af25f3525fbc6e701f53bb7023f. 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/TCAJF2586217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2943b02e3204ecacfc06f170550255619b7e5937e4265d55eff9d8ad0e926940. 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/TCAJQ2519548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a64e0df8670606f561e386e6f7a9b75fc108a8547aeb4856f02b04f1cf0ad1. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:41:06Z), 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/TCAJK2590377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e76be1452638b4baa573dfc1eecb32be5d718561c2f36cb02b7df4b3e3075b. 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/TCAJQ2561885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49108fa3e5388e4c5d555f45fe52a87092a0a23ac858a44c945a2b5b1b94787. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:43Z), 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/TCAJM2525698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dc0a1c3d659aa03cabca6fd734311f1e19640178ec8ce37eb46cdd9bafed3f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJW2515464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eca63fa55b9cbc6ad2988ed6d47700b17e76d248d6bb8f039da6b6f088fcb3. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:03Z), 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/TCAJO2557692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae24f7ac91c65f42671273c4ff99577aaa2453f97baa2933fa87a45f6edfe5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:53:29Z), 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/TCAJR2595523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f0d433d2775c8b39ab9705d5f9e28313cd16ac8f2e729353d3425b45aba48. 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/QT6622516178.