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 0x17e7bfcb08d4036a567cd149be32a4211c7d78253c7c52bcf219f9cb1fbd2d66. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc58d05b-d57b-4dab-97cb-866c301a4cff.json and https://artists.proofprofile.net/proofs/artist/cc58d05b-d57b-4dab-97cb-866c301a4cff.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 0xc196a491ef644975a89bd44a6b77994aafb69ea0052b3bf07a971431c576cdce. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAT2572892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34725c5be57cc34f9efdabd9ab2608297ad58fc749d6d69d35134566e8e15d8f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTAT2572896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1a3dc2d44a7adac102ff6eaf5ef4bbb3b572042152e670d2d08e470cb684e6. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZTAT2572898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e35a08ab799406676d9e23a526ab4d9ee65cf63d562ba9f3eb6b5b2cb252803. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTAT2572899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ae31e8a2a905ddcf6911c74b234231d81a169953378fcb77cd56dbcdbc087. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAT2572902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b52b5e1bb739dbe23c7eaa441889da8dde9710187617a4b5fb2cab50f714cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAT2572903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94eb5cee554cd33009ea01c0e2c887744dbacf31151ad41b626ac674e00a71b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAT2572891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb515d16f64b3af41af4a8fa3466733dfdbdd8dc770d568e7b1a98c587d939402. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZTAT2572893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958d75c6e7f1da0b5431516cef15f08798804eeb245a1d64e4f1610abaa75854. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAT2572894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5905f3b852ab44193d2093c1658c8dd1abc5674fcf54d3e0326a0819cbd31c4c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZTAT2572895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1a3dc2d44a7adac102ff6eaf5ef4bbb3b572042152e670d2d08e470cb684e6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZTAT2572898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e35a08ab799406676d9e23a526ab4d9ee65cf63d562ba9f3eb6b5b2cb252803. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTAT2572899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c71cd47715a09410afd15d261770c70e7e064d947cb8defd3c18968941cd857. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTAT2572900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ae31e8a2a905ddcf6911c74b234231d81a169953378fcb77cd56dbcdbc087. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZTAT2572902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86d001c52f96df4a61aae18415b117820336bc597911f72a53ab7c0aa5024d0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFM2539614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e651f0a1fb3e45afa635b723b0316dd7c7d2399c96b7bb585a8b560c74815. 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/QZWFM2539615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963c8c6836123adf0951bf0188f23d6545898e13eb08dfbc6241b29aea70a88c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFM2539616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb89ccedd467f189af8ebe27c54d6cff6b43c274847d54ef95734e96c30ca635. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFM2539617.