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 0x77b116319176b08e0b81f87d06572e2e1ae47f28da0616bc8be631a1e882f1b8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99defd59-a64e-4828-9144-8785c391e8b6.json and https://artists.proofprofile.net/proofs/artist/99defd59-a64e-4828-9144-8785c391e8b6.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 0x03d9232e902e7c356c8369fdd25a3e072596e988c749c6429ff8ea57f17f6643. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEVWR2301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d68c8ccb480d18427e0c5378c97cb5aad656c1c7d3ab0008e90cf4269232e52. 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/SEVWR2305301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf8286e13a8c036e09506e88079b3d46bcc35c12f1288da2003bcda80b4204d. 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/SE3GO2001501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf9f756f1bc8445b9bb9c8d7a2eade852a5401c62153d170e6045faca6b114. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE3GO2001301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9472cbeca436e6f7ddec78a8ddc329f32e8b3878eff5e08de74d03e3a33206c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE3GO2001401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5311d543dee639b9685883062b1accb068affcd0ea7602baa24b5eb881a669. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/SE3GO2001201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e37f0727feb614a3f7183c5c64d850ac1c20e0e3fc085c2bb6f7b519fb4794. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE3GO1912401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ce36dcd06d64e0dce5078e3b743e821eeba1a270519ea47f04ed070e1509a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKPL2295548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464c00877651e3d799401d5acd315ee621fd55c2bed519116bcc9de5b4de0613. 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/QM4TX2359470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3f7b7cc766292abbcc6bc1122b253f1d480640f9add11a03498167432b8a4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2484063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d26058d3e1b585a59fc88654626525d597001ae7f6a731f95c2d0215ae598c. 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/QM6MZ2414143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48860ec6c5ff37276e709093b8fd0d38372eba7dfdabcef417de03c1568c96af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2439691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d26058d3e1b585a59fc88654626525d597001ae7f6a731f95c2d0215ae598c. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM6MZ2414143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3f7b7cc766292abbcc6bc1122b253f1d480640f9add11a03498167432b8a4. 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/QM4TX2484063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464c00877651e3d799401d5acd315ee621fd55c2bed519116bcc9de5b4de0613. 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/QM4TX2359470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484f0ded698c831449b649a518660dc2e6d1fa96601bdb7186b91424271e620d. 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/SE3GO2020901.