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 0x9b87a41c42d44668bc6652e09ac2052517e8e45dbac69af9c50a9ab2b3f90e47. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecbe5269-cf4f-4b65-94d0-84eaddd78ffb.json and https://artists.proofprofile.net/proofs/artist/ecbe5269-cf4f-4b65-94d0-84eaddd78ffb.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 0x904a312a090e1142df7ee41dc8d5a2d923d65a970441cb8df3865c2956ffbf17. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6P41556043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7c68dabacf8684e0f022a1b42af60c7d33b828f036a25a643e50dbcd2a8ed5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6P41556045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7817ade86b086222f689522e1401e535121e2b3a933d52c8f086e7cc70420bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P41556046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7adcc94e34902e9cb8efe0b906666cb2a3282220ff246079563dd2440205d92. 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/QM6P41556049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd416a56d873ffea2d8d9242bb2382ffceb7d5a4cff4b7bdf4df74f84646e73c3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6P41556047.
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 0xc26dfaaf2f0e30579235ead472a606c66436f8e79b9839e23b40fdfaddf5f2df. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM6P41556052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049452b3359711f8b82499f3434dc627ad0df371ab44907f516afb97dbf13fa1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM6P41556055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede036057da3c420c7c1134fcb2bc16365a945b619a853da345d03b0737c7350. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6P41556056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2280881237336912a3f3484de76786bb40deccbea825b12d3b3e522d179677cf. 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/ES28A0710015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4105c8f2585a5767c8ef1d2de4cd045e0d4c91476e3e55c451406e7e36ca6ee5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES28A0710016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7192ba8c102023f85b530ec9adb11b62c5015fa3ebf220b2cac56fe58d799d32. 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/ES28A0710017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e84867ab9bf71dcd6dbc6f1c4f25ab5d7592dc99c4889b0125694ddd7a6c8e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:54:22Z), 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/ES28A0710018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69ebf7f37582c3d0c2169f29862b93c4d089e50bea5e55a4dd85259abe99e6b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES28A0710020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3877050af1cf82937b757d3073b9f00b9fcd6f6e5f2aef695a5c543c277a21. 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/ES28A0710021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d716b4e3888f889152f7350c97249f1cc6954285b24fa2125b7b23d460697. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:46Z), 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/ES28A0710014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c32b315651e70ac6222bac8ea68b74f274a72285871fcf25b1d046fdab1740. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES28A1010221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe156455f63f9505cbba08471ecaa51cecd23c2585ab927a20f22cb392368e07b. 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/ES28A1010223.