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 0x2fe3f0db5ebd822ba27a56355134adf9e2a3e994a9237592025d0fd1374715a3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fd566e7-f0dd-49bf-8082-b435fb7d97f2.json and https://artists.proofprofile.net/proofs/artist/0fd566e7-f0dd-49bf-8082-b435fb7d97f2.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 0x9e0a92049f6e5ef730a160d4a7b97ed500466f22033e34f6c128c04c56cebd48. 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/QZK6P2268436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24b3a8da15fdad7896b275095b00914627a7b02aec273b34235971ce206d3e8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6P2268437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce96a207344c220c01ff4a98b635f7254bcd8d011ba591a4965e407dccf7da58. 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/QZK6P2268438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf54db49a0acbedd6352ccc091a0803f19b9673d92463fb61ec5fca68e957fa6. 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/QZK6P2268439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82202db01376bb302c5f671f44e37f52365469eb07495cc21fe7e5586a0e5970. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZK6P2268440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb671f9536c1d5d4c18c49f1b2e60b8058da09914f6cb7eb3d8f87371605cbf3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6Q2256062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3158e9964c56ad7b65dcbc4058be5352ed55db102a54ac38a5904640e382515. 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/QZK6P2268441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9375fcf68f9a803f0db3c43892ba340a8c47d3b857630cdde74b5555c5e7fb8. 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/QZHN52424489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecce2c8034c26fbf7c69fe87da624321868adf7157613a55a60186c2b2befb2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6H2454418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e45cbb27cdcb8b27b93dbe290d7ace2583e665dc472e3d1446f07a7a79588b3. 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/QZNWS2434324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6715cc0aa74055c71c13c790d9e11bbe6efa0f9239445a3841fa9f84f6e2b9c5. 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/QZTAW2435748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d11aa5c7433527f8bde5e6da013f0525c80658f36c55283513cd217cb4c66c. 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/QZTAW2435749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64b1f609ba45973550808f62f63f69594b196f7dee2fe06351d892b59e5d37f. 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/QZWFK2514378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef80338d1f7a0e10d71124726a379a749c8c2e68c3a91abda731140d6f9b90e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7X2577585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad29cdd6dc0d7fbe7be40be5903c5bdeb0883a8244892dc238b209fad1b423a. 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/QZTB62499259.