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 0xb4f5a7a6f680102ae18d7415f1885aa0b2a65ef6e963a125788bd800088a17a6. 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/9ecaebb3-7f62-4c8d-a8d3-7c2fff2c1343.json and https://artists.proofprofile.net/proofs/artist/9ecaebb3-7f62-4c8d-a8d3-7c2fff2c1343.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 0x32a287565891fc8f82e1292e80b65acbb228aa1d0d413f8a379e308d0c84e0f3. 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/FR59R1869476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330940119cec2f4f0b5ae98efbb25401bc4a0233e339e733abfd76edfba3d056. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR59R1869479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edca44900fc273cc1555f67a5dc847df3625ab310b9e21c13cb228d6fd8b322. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GX7852401075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80954711822c66bbe81ee38e3a4f504ca1e91ab592f21bfafb1f318186bfbfa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:35Z), 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/FRX202003533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98f139adab3fc5b33cf138e3175627cf5b477a480c1b5530a1ce05cc5d13b37. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FRX762011705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200e646d2a0f745ac93b0b30b97ce66dafd34312cb30c7597014dd12c3a52f66. 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/QZFZ62284034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff92c2d115eacc62bc71331ecf263253e04fbb4fabbadae8dd9c1ab97651cd8. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZFZ62284033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004a190ad0a8854e26720f0e41b10b77a634dc4420da2e054ac740b07ad64aab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:15Z), 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/QZK6H2216981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ff474d2412e13b18903ac0cfb3a706483883988d8f97ae735f5cf0d78ea1b7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GX7852200363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05618351231b2222d7a52cada6c1941b8dad1b5273c02f5cecfb2c7bd66a67b. 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/GX7852200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071d45ca0e7d27e75d87f7fe50873b6b3a33a5ca9e99e316dc156444c58d3b57. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZMER2300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f544b1bfc61b0d84d22c5eace3b9c9f777b648e6b30cb99d5c6bf6a6fd936e9. 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/QZS662208794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eca127a6c6cff16567e45a04c66e000635c47814d40205e1ef582b02bec310. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMHL2465501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b1b4cb62b65abcef4d161b9af4f9358b89a3dd3accba785f4595586807e469. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:32Z), 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/QZZ792487392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff974506ea19fb65f94935cc5b84b3952443beb2480093e6a65b89aaec7eed6. 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/QZTB72523539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fc59437f5fd72202cff509745974612d05c6db4198440f72ee59525c08ee47. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWFF2518251.