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 0x28f2cfd3365fa64856d75612e8ff13bcff6b2491debacaf636048bbd433cb823. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac007218-2967-4231-8ee4-6a311fd8f101.json and https://artists.proofprofile.net/proofs/artist/ac007218-2967-4231-8ee4-6a311fd8f101.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 0xaa578dd90241e570a65c3792d35b6062ebc86d00b4ab6fceaf2c9eb1518fcf64. 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/FR26V2097747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498138e910848d18f22e2d663f6626911a27174a3531edd861474e174ba4302d. 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/FR59R2167163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff009d6f21188b48b34bd6a7a5afb9125f9c461a986924dbe3dd3a49c26f7124. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FRX282132401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dafb0d61f4d592aff59015d8c11b33d2c414d2ca7b6e8099cec632febd569ff. 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/TCAGA2274076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64ed0b6030fecba0347be58ba79df3834d7297fef70d6518dd0f42e0fdbb5d1. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/IT5SG2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688da08d77114a6fd70ecf08c04b0dad442554815031b77d5cb145b71dee6ad4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ITZRF2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118d8f63d306767cb51e89ea51f90e85a1212ac89e744f06897823ae962337a9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ITZRF2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c69d6eacce10679dc9a8a6d637b26f7c66e120893699ec023759692a461b6b. 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/ITZRF2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed698e0887a81ea4a8fb515119faa315a5747ba9c6a32cd60176c933ad0a4cd4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ITZRF2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178213ada43cf7bd070dfe8d433105eafd11509bc484a51133cf40c73010c9e7. 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/ITZRF2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce64ae97f8eee7ab5670b48fc442265348de8500add87cd21cbc42edab55f68. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ITZRF2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a8dd1e9be2e0c24cbe87337f8fb246cb9102c4ee59aaa732b574a54dcb8f3f. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/ITZRF2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a6a9b10996893320caeea9f81d5dd584b78f8468c4ff9f62c6d31a81a4c2de. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ITZRF2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0febbb2d2f9982ae4f0a6e636a7bb17ee67a61e417f3a4bb262d35563bfe3df7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ITZRF2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3208e0e016d56d080edb7e8b78af47c312d47d583a875eb507e4acd2db0c939. 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/IT8GH2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2261c9d0a8912b136b2776049adb35a6d74182fb98a7303ba09935b6be78defc. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/IT8GH2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db80112a4592251ad36af3f9b10cdbba0c492a256aa72cd0557cf9f0943358f. 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/IT8GH2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3944704357902240e5ae9d737ddd2a389e3dc60e5000caad0ce4e593182fcf09. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/IT8GH2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c051df5cec9b0e9e672d8fa1d917350d875c03fb9d8f0312c9d8b65d5efe07. 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/ITNAB2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff057059cf511555a4fd91167d6c189ce0db6092b8db16af39fb72842eb713e6. 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/ITNAB2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad498ae10e789aedb7266177865f01074b5a5d7efb23bc3a9621e18c5b7a286. 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/ITNAB2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea50297d4585b8e51f73ed4182bc4937c980386ed730b98ff17bdcff473b5d9. 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/ITZRF2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea50297d4585b8e51f73ed4182bc4937c980386ed730b98ff17bdcff473b5d9. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ITZRF2400138.