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 0x8432ce6132b83ac52c58f224bd6fa0fa969121f3437cee07bff1ce35292332e6. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15f30529-389d-4574-a653-1cac3b16931d.json and https://artists.proofprofile.net/proofs/artist/15f30529-389d-4574-a653-1cac3b16931d.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 0xbfb36e82154cb4ee9674a85523c0773386cd310e49f0405c3b4435c0c024c4f2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNMZ2253722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3663974e8c1d8bcb2ab74b8a849a0497db797e59d93fa9c110ddf85c96cd044. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNMU2207175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38bbc451fcfcd9c52ea9e92692aa08a1b6bf7e79221befa966f7b33c0985dc5. 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/QZNMU2073430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5235a19545c3d93011197bf5b67c95c26f640fa268c33067abfdada2d298f74. 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/QZNMU2207179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59a90f0340f5422144dbcd1326c4eb283a8c91fdeaf4996df64f5993392cab0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6K2360164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe87df0508b4a00154d623bd14c9cff0d89935d6b78be8259ae3407c3690a14. 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/QZK6K2360165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e54c5864a6ec64e6637dd97128e186979aacc8945c50f627d070375a37c05. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNN22364152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0f38ff5b2e9dcb6eb2aed22d23b874448c1090c50c11b5338b7ed248480d90. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZL382455224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e54c5864a6ec64e6637dd97128e186979aacc8945c50f627d070375a37c05. 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/QZNN22364152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa796ea21cb3565a96c2161101d4ab7b732362955d5f8d3779c2277046666e2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEB1926246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3541b37ad145a06b42591a95319fe3497acffb052b3059e5bf35277d8c215dd4. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZNB82015093.
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 0x68eb32b9b9d087be93a388107c772e2dcf0b473261a5db435f0e13474e5f7a37. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNMZ2222720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec51d726a3668b4078fb74cdcdbd3d251c3a34daa720e4d48c146e61075cb8c8. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZFZ52184077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eabf8220bf693b5be5d99f1332c6f4d6588159fc0e5800934da14be06751d2. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZNMU2207182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a58b7c768db569694376879b12f359d4dc5edaff0cba62393f4af04d6c9932. 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/QZL382455225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d05433f617e3509a15c8bb4c065b3ca55407c556a7faefe44c5575b43bd2979. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAEB1926226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad219ca30e0c39a6e30471d373b352b2c7f57f3a959dd7ce7cfd9631f013dd1. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCAEB1926346.