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 0x95111b955d0838f667e190a105f6273e6f9ff1b8ffe0695cc35bf42b43d336a7. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71d42806-50bf-45ce-8469-7122f4a52899.json and https://artists.proofprofile.net/proofs/artist/71d42806-50bf-45ce-8469-7122f4a52899.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 0xf74f5eb537cc7c66e9d4cc254ba273c9c548f5d41cb19fad066ad9b87494a415. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/LVA100600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eb049c4857f97a1a222effeed11fcc6cd1e3ebb184dd9f7214f4a8258ceb05. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USV351447507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3b54e2085f6333f39df719ec891804f93b579e078a98cc4071d026e41f4c25. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USV351447512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf180cca06f26538c2901584e932a657a91fa649fbd71c5c13c6ff12b85dfddf7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA100600173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f20058bc65ff981d73da82213354ca0dca242baaff57d121c1fde9bdb9dd66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMJG1608422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8973c217e7f7a46ec0e7b001860bc85e486d64ca19ce041cea6804e59ed4e4f6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBMJG1608423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3dbdb3676dee0e62c5d2975036b5f80e82d1c138ca4637412d9989ca2b2e3a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBMJG1608424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac724734c7f607bce460fed523b91f0065ae6f9580d8299ed8efeb258f93e0b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMJG1608425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0070bc91e40a0adda14beaa38a96d7166e2457a4764df3cf707c69c82dbdbe56. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBMJG1608426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d88df448e644e58f316c83d2d5a939121b2e73282807145615a096691154b47. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBMJG1608428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe543dc5b2f911d5a4499f2593f3deb2664406b28a5acffd0aa9f75b707514d73. 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/GBMJG1608430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d7aa0facdd960f621da9c644637bf0f193ebec288079e7df34bde0f8d24dae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBMJG1608461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd032dda2db1a65167737395e6d705131cdf4412792b2a9771c6cade366bbd408. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMJG1608462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19fd2feed1059668b200d4168162f6dc4d8b64e6c1dfee647c5eb78449047a2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBMJG1608464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e817275c5c2a0f8871006721f9dd05c87a961f354ba2bd9a76d11906fc5bef0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBMJG1608466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0a2a3b258ea747df65dd5d599b15f1009a2117a74d819fbccee65485128411. 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/GBMJG1608467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3e0afb633a4e5d19dd9a72a18af852861b1d52d5d053b35418c03e20e80233. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBMJG1608468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7c7003f7004e27a95d6e0460202a0d2476d3094ebfe06cc2634e84adce7d47. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6MZ1735193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee150e0bb1bc4b3698c3c74e6706df67ec757cca76cfa7cf5064982467802d5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6MZ1735194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf938334ba0289f6b4c76b44ba335ba3a10ff375038a8aa5ea1a093d1a26e0c. 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/QM6MZ1735196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd657dde00c0babf5a8bd551ba4908aad5703dd3ed246d01f05cd0029a24f59. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6MZ1735197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699ac6ae447174a7048b53cd9cae042bb9eee67d43c1061cee23e0623a34f67d. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QM6MZ1735198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f1b9ac6ccb1ea52ae0345ea9c329689102638ea38a8e62998daa4f2dc5d3c. 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/QM6MZ1735201.