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 0x3718399dcda003f2514a809b77ab8b4fc3b8af552d41260f73c383cbefb91989. 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/2da80097-37c1-41b0-b128-ba0a422d2be0.json and https://artists.proofprofile.net/proofs/artist/2da80097-37c1-41b0-b128-ba0a422d2be0.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 0x38f51dc472bad7517ddec274d8480ce4142ffdaa7b2a5af75b80c26e5772c2cb. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBMA22392509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a15ff7e287ed04f0926a75c71a9fefacca71d91df5e96cee6689c03aeb4ab. 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/GBMA22392616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40eedb27749d60e1229f567f223c3a2fcb6fc1bba11035571a39420390324e9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBMA22392591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3649edf4ad2f2a7d42f1993c527e8f5dad0e2c34882e8cebc7a4296e8b185694. 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/GBMA22392630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc98105d9cfb7ce403d5c24b5f57350d12bc9a6a21bdf97476ba83d4219e7285. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBMA22392717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6823107c6e672ed65d465d4243eaa71cf61c48a3b7cfd48684d540aaf010492. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBMA22395252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f1939071ae5744668a65301483fd1afe1d6ee08d4b5d659a59283a8ded3dfc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22395262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a557ec272ae7465844414c3ffed2ef10ff0c47389d6b48106edc291d5c10a0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBMA22395556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5ee5a3a1b29ad59f63519a6904fa770de4dafa1e9bdb33129adb0cc28283d3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22395593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d4b67425d8884db6983b95136831293c9c82c664fb7e623b0d20906e0dfda3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22395343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae308a1d35e49a8259d06ab94edc24928bc3ba44853de1f47d97592b19fcc4fb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBMA22397655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb315d03f6eb208e0e378606002c1cc381ba66c4541ed0d0a2d028bc8185c265. 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/GBMA22397773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddb6e576bc83e520d84fb5b11c692bf71ffa246b74b9823344fefb0d42eb460. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBMA22397662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95f40f17179320a8308193f08a023326aedf79718622e495a1430d81f2c3669. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GX53U2301354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb527afbfd50e3f85fdb258567ef72b6daa93e28594267312930bc861c4fd5515. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX53U2301572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527d7c33c91aa6f7815d7779500cef0a3a7d0f226790f3a045414b22ebc644c2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX53U2301537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c13433058f9a7997bd0ebd5f89f1281b19602d319ad31726dab3ba8e270017. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX53U2304411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed0d4710ff6989968b3d07f29a118e9126a2e2f438cf8fdd60227fc1832c148. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX53U2303052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130d2d36a9dfd5712b9574ed87a8f33df480a9ea314efc7035ba2460fa9c89f5. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/GX53U2304726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ae1d8bad159cbda200eadde96af1c1d2c5f46c83a56a203198f3cc2cf9b42f. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX53U2304717.