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 0x8dd96677fa88f1534623b16bf8ac7c63f278a5d7932d8d8e2f081fe2a920add4. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83ff5328-435b-42c8-a790-7292f5822feb.json and https://artists.proofprofile.net/proofs/artist/83ff5328-435b-42c8-a790-7292f5822feb.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 0x22a22dfe95bc7bff26d4ab833bc43e1ede05b61b6f15265918ede60eaf1a0fb1. 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/PLV192200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e288f2b68136af47cdc780ecdefccae185cba7c529f452de56c5c77b427d07. 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/PLV192200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4780d3a5f597ba0a1c1a799bcbf7505c903d3f243eb3f5b19835655d66044f6a. 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/PLV192200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e9186db2db585ea6eba09b3bd2b7435b8f53e4ab36fbc9a69df797d3f22c28. 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/PLV192200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c026271ac8646d3b507f66e56cd0b860f2282590a8b142757b2cf93085aa95a. 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/PLV192200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52574aba8436ee1fc04afb30c2715026e18e0edae0b679a398e5f1be741ed25f. 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/PLV192200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5db54d92e28bcb564b425500a85a3a1f23c5732e57526e536556790a644de7. 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/PLV192200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf222159e1d2acb925e1c54760b2c7158801f9e17248dbea63a6b4991b366abef. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLV192200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe44bdb902d0cc030e745d0f517e765ce8e6d892b475525a1d54d1349f7b4fad. 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/PLV192200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f744cac9d556257cb41c672550c047e8df555ebae3a7909394513e96e5d5e74. 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/PLV192200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b5a57173ccc128ccfaad4a09552e78db3b1eb6fb8920d4cf19a5ff17fcef87. 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/PLV192200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9d72e4caa1d456e30fc3ea0442433fdc470d5d6ed52ff0044fce773f07e5aa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLV192200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825a5141ba42b1dbb691968c0de6fefe779be7895966980a4ced63d3f0250d9. 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/PLV192200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f4cb4948f84ece877ce4393ec9742a17d82ce340ec41eaa858551df83acb33. 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/PLV192200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129639add32d6b6894fd55b57fcf753b4ca3a37d70c3e456905047783c77d27b. 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/PLV191700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a22dfe95bc7bff26d4ab833bc43e1ede05b61b6f15265918ede60eaf1a0fb1. 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/PLV192200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825a5141ba42b1dbb691968c0de6fefe779be7895966980a4ced63d3f0250d9. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/PLV192200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52574aba8436ee1fc04afb30c2715026e18e0edae0b679a398e5f1be741ed25f. 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/PLV192200018.