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 0xb25aad18fc6986a5f97bf9fe95cbd48d2386fcdc355193312b500312ea130e33. 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/de796ae7-4fbf-4c86-a084-a00c32a419ee.json and https://artists.proofprofile.net/proofs/artist/de796ae7-4fbf-4c86-a084-a00c32a419ee.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 0x5e24598fb34402c7ac30b3f78197a958de9b0ae293046702f6d073e97840f43c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USX9P1012768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10ecef6c1b3d186ad54f663ce8279f1defcc0435dd920894c1fb79763a5f77f. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USHM21750049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed5ac93a8f2a149fdb1b0538e30d8c72d50ce9cf2542c6ba4bc3a87c98d8f7d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM21750050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bbb53ddc0d9a35aee12c86a67275480ea5037578090cf8acfa0ae6aac340f1. 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/USHM21750051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0990ccfd619646a6b8c82676ed57e2d065cad1e24c53e31efa0bd4bc53a3f0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM21750052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed26b47b8eea78ca3d0679e87c1e2da60bc719dcc16774d84c890c4b2655a049. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USHM21750053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca78ee548d0ef1922cd36d1658cf2bd39a3fd43ae2c05a4f382176b9ecc92fae. 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/USHM21750054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7b066c53e36409d26a7d308fde5a2f73054104ff20b3b46d317748d8bd17b1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USHM21750055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9709411e652fc2df38ed241c07ce9fe731a24e15955d4e74836c39aa2a7b5e. 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/USHM21750056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa2a9268ccb897f2cf2e14f723e78dc49ac72c3970949618a6d8f31c3cc5edc. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USHM21750057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654e6ce31a5db9b74e79f84b963e5854db4d8590bf111043fe0e93c388265abe. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USHM21750058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87ac8cc0b448b4ce20fd2963f9cd16d708fc60e70e28963162e8d86bb6b05df. 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/USHM21750059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd29c0e8946dd90343bff6b12ca8a81eacf4e5d6cebf2ebc025997624dbd330. 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/USHM21750060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7095c4c7c84c2d5f33413b2356a3dc4968a064d05237916ce970e4b1ae8645. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM21750061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81b5b3489dac71f5b9bf8267a0f5c71a082b7379e90bc340a61435ee42262da. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM21750062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee854d71e8b643b8bf60d6e8288f705e6a5a9f9af6d64b9fa784567df546604. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USCGJ1673296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f601a6c75e9a610f371f9fbb04024e61587f57be53fd0e2f0f32e9b0a688136. 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/USCGJ1673298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69df9e755e7de6317a12672bf18c3388a5fd6c458a49af11dd156fd92fde3f1a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZSYP2477973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5492f95c262db4c294adbf91d3b2098ee8e70f4308d2969b6f2ed3b68d83d066. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZSYP2447563.