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 0x3378dd53fc6803e5875e3d19951474c8e72d48b5188b6d9ce3de4ecabd9a605b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b815fc97-8e4a-4f3e-b4eb-f987f782cad4.json and https://artists.proofprofile.net/proofs/artist/b815fc97-8e4a-4f3e-b4eb-f987f782cad4.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 0xadbefbfc2faab4bbde8d83d83ba392512158c7c13e991eb709d0747b4ce6e1eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM2PV1593957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41785b5171138b147ba9652f2b7ef735580f0802f5a5462221b9fe244c8fd0d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM2PV1593958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7654bcadbc3c3f8f4f9686a108954f96f2a01adc55bca00bf3950d6f96d1325a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM2PV1593959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498e02e80fa6f971d2d15b91b79d6a9883fb6a36e8667c4fbd54ca5f99c4279e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM2PV1593960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c178c6b271af8524b78b454224b86f01b3fe59f0a7e77634695f0972c060ebb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM2PV1593961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14e3d1cb6d9610d1f417b5f22afe3f003c89a146b47805969f5be728ae64005. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM2PV1593962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7508a432f337fb5af6d93ab111a37ed1bc6aa267fb2705f79e92207fb43acbd6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM2PV1593963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8794231ccebfcf46040e945ef38221b8c3022450246cb92d41509cdc94bbaf24. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM2PV1593964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab969359f431a9b1fa59a83d7680e8b92bc9c98f2975cea67657639c7616712. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM2PV1593965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf3003623496df004403a720eb4f89afea63cdf4d8d1d848f72be650e61462c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM2PV1593966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245cbdf08300e97a59b00a87bdd8d2681f3690e6efbe9dcd9689e3ea36157b32. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM2PV1593967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2785c95206271d3d4a8fd232fdfb8b676765e0babb2166c7f9b59d389b46d42. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QM2PV1593968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf6d7e84469bbe59d6c85eabbd9bcc24ea94d93a3039b59ead2f4f83cc8df1e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM2PV1593969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d022045079d0f56532b5e222aaec3ee1b5f3f9b64161743b731a6e14a96dc68. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM2PV1593970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45671db5e7f1336782f8e546d6f7286246d7bee92072c9861122556d6dca90bd. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM2PV1593971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ffc926d19c095f9d7ba31021608e0c46fd010a338b88a862e4ca635370f693. 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/QM2PV1593972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb049ff9d5053387b44dae99423f0872f68d69929b99722f8e828cd2646d3e183. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:09:13Z), 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/QM2PV1592299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3afb10ed75b57f051b09b369873a8f8f6b25409b502a3826e50646ca0df98df. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM2PV1592308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8257265b91579c4fa843327137f6e697e4343ca2d4c779baf3700202fad4b57. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZARB1820096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816ea8fe1222e57a388dcfa560fc1e752f3473a615df076512d3b8f20fa78230. 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/ZAQM12500007.