Crossing Bridges is a live 2004 album by Mark O'Connor, Carol Cook, and Natalie Haas. It was recorded at May 22 - May 24 performances in Spivey Hall, Clayton College, and State University, Morrow, Geo
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 0x7a74f0e1e852bb935ed817bb52238786cc8645e04e67032d07256548ba886845. 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/245c1772-b749-493b-8360-7daefea380fc.json and https://artists.proofprofile.net/proofs/artist/245c1772-b749-493b-8360-7daefea380fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lost in a Labyrinth of Hall and Doorways
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 0x8bd7e7c0f8fa9843403ee5d0c9787089a2b2776b566e7558ac83c56714b773ef. 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/US3DF2179714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a17319f9b6fb5c269a0663bc83169d86c88dbc37211f87c62bbe139e9e65d41. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3DF2179716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780d63e5a7483e49fa5c8483a7104e8140d1ac4c79ccfb8d771521b279a1f240. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/US3DF2179717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd54b1dc0e31c73af53179a64c614a753e6b339ad818061144c6fa8f9df47efd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US3DF2179720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff35259ca98631255c0fdbaa5441ad8bfa9bc5265ab6c902bc0e8fb5f9c6f949. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US3DF2179723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a55fb797b2cb83a26097c024f1096fd8ef9450be14ce3e8922f43091f8322. 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/USANG2218091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2a2a29e0bf3d4d26d7b644576335dfee2d1d696695c8fda2788523c2414459. 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/USANG2218158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46661d9c150232a40c47fa3f655f79f1fe485eb2eef14d6b05dfeedce66bbc0a. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/USANG2218159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d015e753f63df825e9d160396ba64be7284891b5a8ea33bcd2c0f706cf7e26. 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/QZWV32303372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b404feb8377dd8765de2b911ff33530f41504c6f8faf411a1bf589353c238fc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZWV32303373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7a78eccb5f6d42ac6a8c7d45b03a40466bdf5da653355c7d108eff52c1a76. 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/QZWV32303375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aa00f6afad15e7f7e79045e80d9e92e8aeb111cb0b6cdefc9c68bdda0ce64b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USANG2456663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a662524cbb2d4e1bbe1f3d069f91b056b5e31a5b92d9ee4117426156c99076. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USANG2456664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e686be2c4d3e5c6cebc0321ecf6c485ad507971625d62e58db964627a8ee6aa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2456672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf424cbfe7d49d2aa31854db68d71bfeb7ad6f0a4e58afc7b4c81d22ef1595b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USANG2456678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078ac4aad178d19423b01fe51245a9295c424dfbff0d30a0a518130ea6ba6953. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USANG2456680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11299d7fffe3af3c172d04f5c69103ac7dca1814f51932c18c908432193401b2. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USANG2456682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae77f64dca55558927ff2b59ddd916d8b10aa497fc5435e155ad43865f79e8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USANG2456689.