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 0x1aa68b59d21bb8d688ff16cb68d173d7228c85d32daaf565e6c1cb118ff7218d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f37d842-20cf-4b86-a750-636c9e91bded.json and https://artists.proofprofile.net/proofs/artist/3f37d842-20cf-4b86-a750-636c9e91bded.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 0xc19969ebddaf849d24245b44f18e371f9703e331463e08d3cb13ca50a6a1f6ca. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NOMEG1603030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efcc6ed90233695cd7fa755956974be67af410c9de3a1d5780e6bc29305e2f7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6MZ2133724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4169361e1a28c4778a08f62ba558c419870304510f2dc4e3c92eeb78a048bc43. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:28Z), 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/QM6MZ2133725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d3e14b06a70c8d2a5e64399d2ebae4abe450015294f81ce122a698303bc15f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:37Z), 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/QM6MZ2133726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62777d05b481f915d860125766d1c189628ac3c104a257432b743559164bd1. 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/QM6MZ2133727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8af75f7c86798105c941a8a80860bbd9d2df5ba626874fb1519d04631e1f13. 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/QM6MZ2133728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4668ebada92934bbcb17ff140845d85f09c07c8425fca367e8b1298ad4508059. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:02:15Z), 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/QM6MZ2133729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeed295e3a60c3704079f994fba630b0c62c0a80a4bbf17573e91fc5428b9b6a. 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/QM6MZ2133731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc8dd2b46c05371c3fab0e9b513bc37322a87cc261f86d6f2cf111523dd21d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QM4TX2344801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7746f3cc221a0cf0133fbc26fef8f1865afeeaa8261b089850f33c8855a98e73. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QM4TX2599815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe16b4652d8e1a7b2733a846805c322f789682382f0e5541ef37b681878214af. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QM4TX2599891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a691f4c9f14e804432469ae470adfa94c064efac9b12674fe2ba9a16b55fbb0. 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/QM4TX2599898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0921a02fb69bf8c2494461814f0bd4c09c8595864927613879f7e2df551cc8c2. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QM6N22564219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238c657bb6721a9fbb9f44aee4d5fd6c6dbb755db4dbf56746ac959b79fff236. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/NO5RE2507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aefa5c6c3695d3a46eed956acf5b837576fa37a89d881eaa0efc8384d421e8a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NO5RE2508010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19734df70305d24c75aa0d0b8d64530e37953ebdf4db796b67a8dbc299d5eb77. 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/NO5RE2508020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0921a02fb69bf8c2494461814f0bd4c09c8595864927613879f7e2df551cc8c2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6N22564219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc8d04b6be2e312c28c0da758098d310f8d19a451b4a18552a391e5cc6099c7. 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/QM6P42598406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc8dd2b46c05371c3fab0e9b513bc37322a87cc261f86d6f2cf111523dd21d. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QM4TX2344801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95a0f3ba54b4db726ff7bb8198f4806f2b0cc8d20fefc3ec850e066ee201d30. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/NO5RE2508080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb927690257894cbb2261d707276dd356366af1e3f160e615fc6bc74778fca276. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NO5RE2508060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d0c058fa4a8aa496fb8f427164afe429e3ce1f7f2d5f6e565452ca93537ab3. 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/NO5RE2508100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e532e9440d81b3fa424d22706e5c5b829ee30d241d1694e73b1e20dd20d26f9. 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/NOHLX1650030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb25a2c3837a225e9b3b2be2fd10128e18d6dd2c91d39d304bebf9cc3853da13. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NO36X1402010.
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 0x80cde4ce2753fd5994ce9f317b556a7053bf12d4a9b678ee6320310a322aacad. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE5AJ2202124.