thumb|right|River Dan within kibbutz Dafna Dafna () is a kibbutz in the Upper Galilee in northern Israel. Located seven kilometres east of Kiryat Shmona and surrounded by three streams of the Dan Rive
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 0x547010d9b07e944c231a2410a15e0ec35dd8945dbbcc9edc3af6b3e3601d491b. 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/edb9cb6f-e0b2-4070-8ed0-b88f922c47d7.json and https://artists.proofprofile.net/proofs/artist/edb9cb6f-e0b2-4070-8ed0-b88f922c47d7.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 0x5f11ff7807ed9e2e90fd99d4dd4e841946a42c53fb6d002485aa218b0d72367f. 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/QZ8LD1986233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc23a110ce76aa460cd6b54ea59151c47a52b1cb5bd837bed5986955f3883ca. 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/QZFYZ2087061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f5408ebf1faf8f6b7d8a03756fd06460fec5958d8d5acf6f7cb2bf96ac005b. 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/QZK6L2054361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f11ff7807ed9e2e90fd99d4dd4e841946a42c53fb6d002485aa218b0d72367f. 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/QZ8LD1986233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe103d9eb63c6ac3661a16175acd0dc4fd45297b14350dac7013c71926997f. 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/QZES52010320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8ad9d530c3c005e3aa7a3e26e91b24a341a586aa5a645a99b1e2dc2593c2ff. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6L2054364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8ac31cb9b306a4a560a1c77216750f293cad1b4466660c79291b1c3364e90b. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/GBKPL2143282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270abd166dbb65ef474b2c76008951c43f592825d25f0b377c8db6f9ca4a85a6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBKPL2149072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c08df362e1b58b0db5a2150d9f7f171465b97ff90807504bdb7e2a4d04fa24. 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/QMB622100801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f8acfafd430755605a344cb77d3844463db3823528c633842602be24376958. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMB622200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c08df362e1b58b0db5a2150d9f7f171465b97ff90807504bdb7e2a4d04fa24. 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/QMB622100801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac78429d072a675f0665ab1149f7795dfa9fee6d490ddd7145305315cb3bd847. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWQ2239200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b74eefa8547fd8ca377f025a94de9a1733d8e5010070153d66696e44f9a8f5. 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/QZTB42245907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7056de0e5d70b93cbafc1408622d0ea162ec887043054b4be3dd9e9917e458bf. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:32:49Z), 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/QZVEM2333739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c10b1f427cb1dea2a2fff1c5073e8e7f7b0d7a6c93f9e4e8ed8cd7ec0fb54f5. 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/QZVEM2343593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf1ea1eb235667b37c25c38468262857cb847277b56d442b5e067c8fa0fb91a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZVEM2350796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264d99b0e9041726f2f478005cd7e79e69a0cabb238d42fa7d11b4edd948effc. 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/QZVEM2376614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fbec7ff80eaf9b8dde108774f985fb87545fda4a01cd9bf78efea737c1271f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:09Z), 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/QZVEM2363479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a2ea8a1401aaf999c81512e735aa79c819a4515625b60d60d20aac993621d. 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/QZPEW2416753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c10b1f427cb1dea2a2fff1c5073e8e7f7b0d7a6c93f9e4e8ed8cd7ec0fb54f5. 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/QZVEM2343593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca54289e37297b272becd6d0cfc2e1cd6b670c09f907a8f2876f9ee476e8f6de. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZVEM2397012.
THE PARADOX OF THE SECOND CHOICE (Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250163a645a7ae3f420136ba9a3859c77446d44c4f5561f3e63284653b211193. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZWDW2504345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b6786a8fbdb50b9e57ded23835010dee0388ee892e5c010444a39f8b6e141d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWDW2553073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacafdc95319f7f0c5ab4a74d607d3dd4448588848c2e76bbde760f242c1224e2. 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/QZWDW2574929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aa4f8bbccfedbc398ccd96cb781c9a51ca07ad5b5f86318f516304b7ed5b08. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWDW2585183.