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 0x23e73d168562f4853688dc7d37fe19a42728d528e02e4441632c215a0569fe22. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ff241e6-7a80-480b-918e-8c10dcd5601c.json and https://artists.proofprofile.net/proofs/artist/8ff241e6-7a80-480b-918e-8c10dcd5601c.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 0xc3e926f982dd4dfb73ec7e20598f78329746efb083f9fd823304ddb07abde827. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2451780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f229ca434763a0bd960688f49da8ece7e06bd1537a30d8cd72127011a76c13e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX53U2451192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eae29252cbfd0da5699f54aca035d786ba597c05ac46103b1a2db61c5598e9b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2451193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbc2d434ffe9094dd80c7563c5552721d4f18c81c57ae58a14f2a6e188f5267. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX53U2451194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51063deab0fa1cbeac817e560f9fc1c2b4f3fa586069e049802bf74b2fb57419. 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/GX53U2451195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd8c8c614160b2db74bf55512b90589efa96eabba9d2bdd1b1fe2173ab5e75c. 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/GX53U2451196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52da31c6062088175ddcbe1a8e7a2eba17163e82c5355710fa82406bbf56c77. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX53U2451197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98b76cd5692415494db722aa7a60dd09bcf2241e9e4726cbfef7acb0b124e21. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX53U2451256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f20f0b0cb99c668285d7fdd109e256ab0985742d6e57f51d0c513a4bd41b79. 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/GX53U2451257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d860be5691995ae262ebac904932553a1092a2ad0a680359070a1859f4bbdcf. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX53U2451258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f77b2d616a791123b2b76ff182e100daec30d2fd75e37ac529c31de1845bb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2451259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8461971cd34d8bf743a112ea8c48068468207dad5259ba8e3507819613b1c4. 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/GX53U2451791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cffbc080cbd56ef681ad998a0a784df0b4b942c549796928e9a8af09015d88d. 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/GX53U2451772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f0381c7ecc5b2687fb34915ceea325f8de81b99f965246d8fae290acb4f4a9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2451219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdd2d4398353aa80ab62326b9ba0f440bd774597f80e5b63cc93d45b25e4ab0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GX53U2451282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6799d375631a76a3d3340a9efbbe9aeabe7b3cbe4d6f13d70bce15ef93cad415. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX53U2452004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5aaf73ff2a51741a38f44c77a2f101e4a7a20e6e4cf8fa3699f4be8e9dec9c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2452002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce95e0a7d2d475a3fdb3742a3c2cabd4eda2dc068f6e5166b4552a381de5f83. 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/GX53U2499940.