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 0x929aab5f41222af9fbd2efe602aa0b2cc83903bcf2f6fdbe0ac3d58e291c0b5f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10cdf052-a636-48e8-a0cd-a2fcc99a81d3.json and https://artists.proofprofile.net/proofs/artist/10cdf052-a636-48e8-a0cd-a2fcc99a81d3.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 0x68b280b7a5bd64ad8b8db19adbfb3f5c7853e1850a85e68a41b15c6adeb12ba6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMPKX1523775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba12cf961e69d629d24f984ee862a5406ed214d7c29aabb2088f818ce0be2a7. 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/QMPKX1523777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2b206839f424538909e9effb1f626489c073d206e2a8737893426bbb008c10. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMPKX1523778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe8f1dec051ac3aca9fc89a752f21b5e69213b5eb40b9aac92e80c7e3c9428e. 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/QMPKX1523780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fded11678cd358a6eabf36ecd820744ff8c7605b6d2937b68950101d72db68d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:45Z), 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/QMPKX1523781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e76798e6736b66b2a25ff0a5d571525fe995ed94a34b2c231f53b3bdc9b056. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QMPKX1523782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa66e354f4c959d0474c8ba30c50f36866091b76dca48229a9e9d67c57cadcdf. 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/QMDA71836540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950c0a97068310a919f464f84509722ac4d384b39113d3837488f594b6d0a580. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QMDA71836542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d63493077a095e30f74f518ba1b8a6b3c8890d2e858d2c9b489dcbec6ee67. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:17Z), 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/QMDA71836543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a86e171fbda7da61fca90ab75af182e7bda47e8f6270a30c4958b1b3b34bb0. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:58:10Z), 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/QM6MZ2004610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2d8a1f3c8b4b388b9c44e88beec7b1554890fb79fa51e607b93a4ecb14a2cf. 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/QM6MZ2004612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdcc3ddea0d6f261fec6110291ef8e5122eca22fa1ed78461305fea4be87e54. 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/QM6MZ2004613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d83743c777213138284d398c715934bb45187e6020456d85f8ff58b85a6e667. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:56Z), 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/QM6MZ2004615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3be6d8ee6f907933277a7a6a95046f658500fb875ab18d0c569128622217dc. 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/QM6MZ2004618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcef4c0cb5dab866c7a5e63d89da39a6fab781536a804f2987daa9a078c0c3c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ52037244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2acb9f39a9adf53dd31464baf04ef5cf4fc81c38abbb7ced808e182a9d7214c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZPKV2101503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9c6c2540558f566898d8580968ddfbd9f8b2d0a2e745670293fe469f88a8fb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPKV2101501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcefa4a1522f71ea186436418b616c85239e7fc95772a205937a5aa9540fbc5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:46Z), 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/QZPKV2101504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b05111221dd641b2c7a3223cbb96317f86948226319e26cc68470423a3fe3d. 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/QZPKV2101507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f724ad988f63247ab878a3afb5b9146b0355a119f9572cdcaa2c254f15e361. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:35Z), 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/QZPKV2101508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a0b504cdc0f0dc2b00a25dc3b421ba17fd591fb2034fc9da94ee921cf95a3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPKV2404402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd311efa87a2427406b19e2935901a62dc643cf1d62b0d7de3ab4b4e321a12ce9. 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/QZPKV2404401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299b3f7e30a3c0b7345583001a52492dcb71e692e912100ff8756361461ea32d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZPKV2404403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e516ec1206a44e2818a5f0adf2ad0d2068cb394454ddf39e9cacfdad10301. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZPKV2404404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09709905f0b612f657c83d1ebc12ff71d7c8e8fb3980aa06222ea3d903190ee1. 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/QZPKV2404405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa90cc17634aee2950e81a7413555027bc7af26923ce464ad68ba5259f753b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZPKV2404406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e838f10b3186640710d10e3c0e065e1613db5cd3f5b23158e1acc513ba7edbb. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZPKV2404409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7826d58e6191c3bb959bc03ae314964f26ff9178fa5f58319c74469707c0042e. 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/QZPKV2404410.