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 0x9be9f70a2f4b9271bb5a6617570472f8ca0082c47c3fb7e7e30f0e3d6952f496. 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/b00705af-4f04-42bc-8dec-bf13eb5f0dcf.json and https://artists.proofprofile.net/proofs/artist/b00705af-4f04-42bc-8dec-bf13eb5f0dcf.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 0x8c59a2d5a569c311d84220e99f0a570d7f4dca41bf6615e98b69dc7f6704a3be. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SMRUS0062917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d605136a26caa4585be7da0330deae2e369035bf46aa6867eec323f8e01370. 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/SMRUS0063585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96c7e38e70089489f2ac23410d89af2d12a2dd56b0ec74ed28033f446be9a65. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SMRUS0063882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5fc8d030712f1d07573398af043070cb200d9c99a0316bcb41a15db620cd7e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SMRUS0066020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ce58cb8303c0a19765e21a7e4226bda49b2447a56715a5367f5cb12df8b3a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SMRUS0067954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9cdbf9de3a8a970eb6e397b3af9c251bbbdad601833942f5f320a4d2fd2065. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SMRUS0068332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e1a8a2a1e5fa87e1a72743a7c6fe2a054c245f85e4130fc4732251fb97ceda. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/SMRUS0069425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7213c5f0504fb215d5ff3553952aa423d9fe8bf16efc089ec161655d2102e4e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SMRUS0069420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161c4caf08ffdcf1e439d0761661533788e39b5eb9fb6ac13991ae3eb13a38e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SMRUS0076682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704a2827f76efc917bcfc254e8c4736ee6105e828155f8d459114d9e502bca13. 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/RUAGT2453243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf7990ebfaa1a4f558f06ec9e059b21ef6bb8681f87e75bf0bd72afe75adcb9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2453244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e4d0e9b2d513e41e47834881260150c5aca667f445686b4ae681a7a7e9ebb5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/RUAGT2453246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c05b90ee974576193309623e063d8de6a309f6bbc180199cf366428fb58243. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUAGT2453248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c32c2538c558969fc05529871ee154e1d8159e4c40da70e5a3da34fc9a7c47. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/RUAGT2453254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3e9185d689e23638df8b103356fab21a6d0ba93b0a17e9b17648e492a4c1d0. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/RUAGT2453258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698e09ba9bbabc7e52fad6717040d17fae418ab3ab4e614b9f37f7ebfe04976e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUAGT2453259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39346f7047d48bebe2f9878464c9936e8914db10b5a29b775bfcfa4bc0fa3b03. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUAGT2453263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59261028f33f80c05d28871343f7fb66b76a1de3bca42f90415b26ca70b4effc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUAGT2453265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4fdb88bdffd81ae314a24fb7a07c5c72e53771ebce52beb214fde9af30bc7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2453271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c63e8246611e68916ab29ce99761452a23270007ad0bb24cf51d4cacf0288d. 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/RUAGT2453274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94063b651b3a4d346b1c23678a05f3491d147983cd37f09f4d0f54b41c62d568. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2453276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a996aad41e0f0e91d766cab57eb9bb7ef3f2cbafe6de0b2c656abb51544177. 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/RUAGT2453278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46da0bef0d66be487eacf12f2985409d4782b566f02c15bbf9f396aaa4198d6f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2453280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a68a8fd23c09bc9d1cc31a2fd19cfd1e4c96da0dc6497ebf89fa940939c501. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/RUAGT2453283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf535e1b3e5d305f64605088b85d2c219b6b8914c2fee1a09ee8a719158bdbfcb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUAGT2453285.