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 0xea08540631d65622805bd47c6f991137849052ed883afa33091a178c6307924f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/360635e9-2edd-44d6-914f-4741d10aab5c.json and https://artists.proofprofile.net/proofs/artist/360635e9-2edd-44d6-914f-4741d10aab5c.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 0xc57de9e0bcecd304b4d97d759e7f8940a95f858e245e32f474cc22c23ce220ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN92080916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdb03723e1a3800e8f99a77291ca59b8eb3dbcbd8bead9917ba8db5056f14a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN92080917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3483224fa9ec1ca4a6cafd49436e75b1214d3198c71b16458784875ace980ba1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92080918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469d535fcd07c5f5357714915aa8dd56506986e1dbd368559f6e50555a1125df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92080919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19783aae823c3cca6cc2a44d06efa5f029eb79d2efbf1afdfcbe18ff500334d7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92080920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d0f910be0bce9acac210b31883c02609570595dd6736ebee1dee9445157b7f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92080921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b45a7385116bb234c7f576c3a3d58207cd924a91304ae1a414865e2d46fac1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN92080922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4e70ee9d64155b8663cf7e70954da28be35733650146fc797cb87648c64d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUWA02300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4e2d3b18bcb7fc731f958f303afae7946c4915e61e67f7317e75b534ef66ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUBEC2222892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c4e1cd69a69522e727f18b685a39daccd967f09f66b659d133228fbee09c0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6G2271610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a26951a93287a704f03306405e4397bf6652fd47ca288816e1841f8cd65fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUWA02200779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d223381eacb3f38f3dd66d891edaed1a4ffe11a83cfbb73929eaeb6fb09345. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUBEC2147270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450f387cb5deb3fa4314632dec6b40e0e7861d1416755f99fe503ed9c95e4a17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYZ2139551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3dd0a7da2e0d793e3527fe961daecab19a022a5cc391e9c371b7516331a2e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEQ2060750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110c44967ba9c4fe547154182a6ef9d9954251da952c29126cdd11011d232dce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES82012843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fba62dda0d78dc64e373cc0ce992d56146841d4058626a4c63ab68b84851af. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUXN22028542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ce097194f59f13a3083c1875462317c8263eeda093f2da5a8277867cc015e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AUCN31710485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12507a9e405114bcac5e6a5c9e07bd7bad298f03bcedf9793f6d6641ad25b40. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AUCN31710486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd441c4ee08d5a7ac72b3d5e01abac5e4f816c0f6d0c75c4098bc92ce91f0698b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB2LD1700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e879c4fd37de9f286e2494586e070973e1cf502fb4c67d5833afe4d35b4bb4b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUXN21800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d8e9fb85aeeb04acafbfc035cb0b4f51cc9047452ccabd646f7f79a64dfb99. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AUXN21800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7475181660d5c7eb1863006216625bd184348c5ab16d39b25fdaab2df96ac15e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUXN21800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00e3f640adc78070fec960170fa1febf70a58028b5c1184e8f593fb188945a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUXN21800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2604b14229edcc4f3a5b15924113041d26f56159356048f838c5265a558070. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEVF11800343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dd86d99b71bdeac81a6772e3bad7ea0545452482e430cb33befadfe061ac9a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEVF11800458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f480288a2aa032ec236210c0d7dab94d3e53adf9f9697ecd494b9369e91b8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ8LD1754919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a7752c4ddeefd9a63028bbd37808c0604af01a8f78a5d4536d097c31f96af1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEVF11800412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e058a0eb2da5d8a7b0eb9d77001578f6d886b6696fe77b522447ccb4f4da224. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEVF11800459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeabedde57e01fc529b840b9fa8c553f03e355e44fbc2bc1436ad2e6929946e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEVF11800460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1cde955ca4d04c1db0fbb91fd7d9626a12a8d2db9a7adcab1a39e39b78c1de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEVF11800461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae25164e5f84aa1d7fb93a67e7e069b9d9c4cc1739478817209a1a9f09d17c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZEP01404101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dfffb0e38eda0fd5800475cda111d95e88d466b0d8c57bc67eb4dfab2cb4ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ91414347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01b2ba4415538bb9e9b04697bf99bb3a0fd9954820b79952c12b61c124bd6cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ91414352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b6339d66d630b46d815b59d6fcab16c1f1868ea09cd94439a6c64e7041d55. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ91414360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2eb2edfa47e4e6ef0f6526de38c385960fc1161555f6380295b612fa363df2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHP2074595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca24e433ea9d0faae5bdaa5624f7acc804a72a1e6eae2eabb2dd05dba1bf1b89. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBUM91800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43acdaf9d90af77168e097fe57b997bcd7edf8356766a1d5798ddae23c05835. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NZAM02222440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67a6c379e481ffae3856b079d65a413f525da3acc76cad0a11e115586e74a8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NZAM02222439.
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