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 0xc05fb7c0aa51bf2399756b2b750d5d3a534f7f3ae6e6996343110a7e29316fef. 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/8097e6b3-dc40-4281-bdf9-c6d0b83b001c.json and https://artists.proofprofile.net/proofs/artist/8097e6b3-dc40-4281-bdf9-c6d0b83b001c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En concert avec l'Orchestre symphonique de Montréal (Sous la direction du chef Simon Leclerc)
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 0x0e99356c4f9be76248b22ac593a24353d825bc7f9181f49daaaa163d32965544. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAL542122001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c0b137637cc6bfbd824fb73438c8c335bb413281b1b299531ea45a8ac7b3df. 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/CAL542122002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a07be8546bca5377ae57d44564d4f8b2dadb5f5e23c20f6a9491ddaf4c6ecd. 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/CAL542122003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7847c91ea1389fbea4666c409295aafc3fe51bc4c505b0a0c1ebdbfd3eab6310. 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/CAL542122004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91c2ec42c08984e77a2ba149458cf70ffb8b3c4773739d4ea5bdb459680aa8d. 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/CAL542122005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d22bc8f11e540522a04d9b9661c72077ab996e8d5378bccb5e43771a288fe. 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/CAL542122006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c320a9e57a07c34c392aa8237129c8b368046e5be4f316d9888290a967db27. 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/CAL542122007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16eb1df905279159db3333dce8e85fd59d77614e6915785c9d2dc9248891905f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAL542122008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565b59cb727a33f575884c688191d195cc0ef1865b7036f60f08cc452c74aa43. 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/CAL542122009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc621509f45494acd48e23b65c299662f43d91fc2ea5ec1ed7d580a7f6931e4. 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/CAL542122010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23a9f5092f065877dc8cdea03f0bdcb51c90b04bfacb5d067307858e2af370c. 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/CAL542122011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f00c2778ee315ddd561da2cb75ebfd9df394544c1b004fd768b8e366d70bb7f. 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/CAL542122012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ff1ae407c62b7bcab219f97a0db28725c7e3fb428593018a6bb030a24aa10. 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/CAL542122013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d9b4d06b313844809a027b6de8bb4937bf0d9aadc78ccf3817b7060d3dd731. 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/CAL542122014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dd694c6e7bec014493caf9138b47030372424725967d9f2a35f3d01b3a5ca4. 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/CAL542122015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b7ff385dc6087d5e0fcadc05a35bc8db5fb19af6eed27115d23d08b21359b. 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/CAL542122016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db5a764b18bedbe8aaaa105ea695319612d6fee3233ab22e8d8c7799cf17096. 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/CAL542122017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516cd9610f72e92b05758914848c482978a1de463873bd46ba2f949f1faa9743. 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/CAL542122018.