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 0x576ff67891d7c715f36a7f97e31de043184e7e36810dd296f207ac6f103f5de7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37f3d24b-f327-4fa7-85d5-160a2c1c1f9f.json and https://artists.proofprofile.net/proofs/artist/37f3d24b-f327-4fa7-85d5-160a2c1c1f9f.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 0x4e00ece8132575fbbdef13728e918683b3d61905da5fdbedaf6e2fa45d8f0fa7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE3D72301101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2e73b1a6b304371461cfa3e279b0faae649e7aacd1625263c9b40725734ae3. 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/SE3D72301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f666a502ef299bfecfd94ccd6a92830c0e0d8fb5c43a9c1bacd27920b72654. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/SE3D72301105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78cd611a6343a69d6a9ea80937292519831f247d3b0189d4144c4e91393f77b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE3D72400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d6966a477b76e4c04bfbceab857f594b033b7eb3a9c4239337d66e303fccee. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:52:14Z), 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/QZWFV2491866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22376af92df42514a3b6ec9cd4570492cfe75f4ed61e97645f8e9f5f3dfed5de. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA62537499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b4774864d46b7fe0fab25e1385f1961b7186dd691e3d6b62671e442f8564b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62514999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b16244474cdd9cb9a9798725b52deaac8914a13e46c0e5b499f3b6937c60ecc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN42549846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59cdaa821046300cdbe40918da983fdadf0f0b3b1f092b68a72e080a4dfd50a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN42549847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22376af92df42514a3b6ec9cd4570492cfe75f4ed61e97645f8e9f5f3dfed5de. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZDA62537499.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f3ec448074e05b6d3f3ba012369899d7ccbfc65598ace8d3926f5fb4db4cb. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZHN42549848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea56b41afd2c79c305a708553510ff8ac2ed445e8ae3935b582606005dba5f4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN42549849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5e44f248d20a7c1b152bc1d4cd28435fda8647789e25a79ad73cc07bcfeb77. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN42549850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d3b34208e7a7c425dfe9b948b23cfe8a12e2c81397b20d6bab01aa7fdf41d0. 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/QZHN42549852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b4774864d46b7fe0fab25e1385f1961b7186dd691e3d6b62671e442f8564b. 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/QZES62514999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c1d0a37a8262b5103a7ebdc1e9176f2c0ef95a911d1c60e1ee681a4ec3ce2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN42549853.