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 0x0c974a20e07829c210fae4ddbe541aa449ddcf68567152963865f7023e0030ef. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05afaa37-4178-484c-99ea-632a6c31e7a0.json and https://artists.proofprofile.net/proofs/artist/05afaa37-4178-484c-99ea-632a6c31e7a0.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 0x3a5da260d38f873c50ef044b0de3006728b1e92aa4622e7ef2ad6bdc9da3835e. 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/GBKQU1782582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d609d2613ad081b23b091ec5f9ce82b2e93aa4d6d2a1080131854d9c3cee2. 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/CACWV1940319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843932befdfc82778e3dd90aff05073a13ff98677112681d34fbc0a49be25d85. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CACWV1940318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab7184cbdc314a93ba65a490f0197407afdcc9102746336ee8db3a4ec12c25f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CACWV1940314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274de5a30314cf57b2710ace38018ebab7668d3cf281fbb4ed15d6518bec43ab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CACWV1940310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda454611c66905f25900f0e1f63857e32a565aeb529243549bad8c953b6ebb59. 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/CACWV1940306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111ac63ef46351e512ad32732e75f1fcfb97dc9a1a91ec99d575594b64075584. 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/CACWV1940304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b28341ce60b7a8fad71dc84845b36b253c97c4d296b9fe3cf575a8b9a7be557. 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/CACWV1940303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117086312614a61bd8fc51b505549a0e49f8770db780ad4c1d1add1ce2c6425a. 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/CACWV1940317.
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 0xc2f546d162bdc4f31d7fbf3dd49e19c46a30351970eb3aab386d245263dbc05c. 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/US83Z1920409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd1cfe39062b04ed30514790ddc97c2362f4bedb1ec018e2aa07b063bde4d8d. 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/GBKQU1849473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca14fa603dd79d01eec6d9c9b7c9358c3d690ce2ebf53cbe3b56a5ade46fe02. 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/GBKQU1849479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1ff0cf4d4f348e66c3faba2100d05f1f6c2f6d100d3cba2a42c935a90408f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU1849481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dee3dca3989a9beda24c7e6d0fc8aa3b5e660f0ccb5b0e5e6c72158144f0fd0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBKQU1849475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d0c77c2a82f49a1382dc83ea4fd63a2c9234c2c2e9870ff08998183ef3a5c. 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/CH6541900580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1844f05249001579b9284415b1fe69a20d43f333df43da8c028feabc7f03d2d0. 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/CH6541730975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46431e98f1b6efa937101cb491ebb25c9cbb142b2c635413a9394f0723a1109. 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/TCJPX2392746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784302771b976e97697946957e59260e2129ea998acd5cf1affe4a076249d643. 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/TCJPX2392749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ff9fafecb263a7936b3384dc70399aef3fe505db0f0668232b1a63ca31df9. 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/TCJPX2392762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dab19e1637b7820e1961ac27ee9ab19c4a2ec1f3da8dd07a5be5289654c1a42. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCJPX2392753.
Special 5th Year Anniversary, Pt. 2 - Melodic Journeys Japan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2a7e15af6dda2f826bb79fe89f4e6ecaf082c79def833a0afedfc4759d5214. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLV62114622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129f6591298fc389b6a8ef040eef67a442f740c4c15304b458650c88645a7c91. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV62114627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071cd0065f54837697f109e98887e3a4c3aede8aed333c8ceabfd8da2b4b356. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLV62114628.