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 0xf4b1d7ae231a387ccec3b2ea93fe3fede14fb7af0bbef5d93cd4075f1aa57b8c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43005abc-d3bf-45b7-b702-b5669c734234.json and https://artists.proofprofile.net/proofs/artist/43005abc-d3bf-45b7-b702-b5669c734234.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 0xedb93483896cbc4b5a197dbe6f4aca80b4318161193936d3cd72b4822db4ec9e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FR9Z62000376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4606d175195945057e75d18749a89dcb2a7d61598abd70818da9c0319cca61. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEZC62112708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0ef6dc3ce669207d615813ca3b975cd04bc891937bc44345fabc04234c4a0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DEZC62123183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2962f9a060a6649b2c583eda1eedbbfe874cd311b26dd478e64428176a7de3d7. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FR9Z62100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7565e18dd1d85e21842099cc2bd4aef6d07f529778db0152a79216dc83afdba5. Chain 2 (Bitcoin): anchored in block 957737 (2026-07-12T18:02:09Z), 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/DEZC62140517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8735a0b9c581a6a1846f5c5450730c4d61ec174bcc27c464de5dafce05c34c6a. 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/DEZC62140627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da15a50863809989734a5d06226f5973216803e6631304cf33a59ecbedb3046. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEZC62140628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f9286dc9238d670c909d1d2e2b58b99c8b5cb237dcc0e9a2cf28fe1514499f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/US3DF2243588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa156f98769cef484232538c66882eeeab57cb338cfe3a932052187374493f8e4. 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/FRX282256288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d1d2bd133bd7e4fec844f78bad9304fbc29c607a1db3a2582ca761a9172aae. 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/FRX282256289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc6677ac7ef25c08baa27d8b5ccf1199254858c818adca0c9f10f78462498f. 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/DEZC62290748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e35744e40ced816be965760a6c7ac459c8175d38c28ef5a97984e76dadcbe17. 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/DEZC62290746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa156f98769cef484232538c66882eeeab57cb338cfe3a932052187374493f8e4. 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/FRX282256288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7216086f3969f638cc9750635ce0739f0758232c14d76017cf4d62ad7c8df. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEQ022274623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bab8fbd8a5e34eede560bac4653460960f7877a9f69d02e13631c80cb5bbcf. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FR9Z62300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c09c943aa651d579f126d96afdead5a7e8ccf5b073ec8c03b2217e814addd2. 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/DEXO12424922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650351a6d7c11b624eb59fd75c75f30f761faa7bd0bb3f06189799d2149c0b00. 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/CH7812526578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc583c078fbe775d3227f7681a5f7dc0c603a7efa26f339d74c54124a00a9835b. 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/CH7812530074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf9a6b99cc4ee168cd25f0cb99cd229511f4ef267d432e3e1fdcb9611c3e44e. 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/DE10G2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f1644c0bec66a4dca09fcc899babb64a7afbc8d92e8a3d5938ab3b3ee2165. 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/FR9Z62400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb081bfd82c99ca8f3f91c093e847038c86a0210d4bd4c098ae24f3eae15c7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEQ022384402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ed1b48e080f2fc8d8f33c26947c8c79d3532521a25b4ebc8c88fb6979cad3e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEQ022110814.