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 0x293287173bf831589001b17a7dead311af6d8407e9c6b6022375ef0f0f922b69. 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/2e0c6fc8-4bb8-4051-83ac-5f5624b1a818.json and https://artists.proofprofile.net/proofs/artist/2e0c6fc8-4bb8-4051-83ac-5f5624b1a818.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 0x958e7ca5d13c82bc41f1d7439257e35c93c27a137a45e322069cb4fa85635f26. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:49Z), 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/QM3DF2251526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f4a6ed990a02a96200210a79562c58e9c7d6788d437ccc0c79974d91c4f3df. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM3DF2251528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958e7ca5d13c82bc41f1d7439257e35c93c27a137a45e322069cb4fa85635f26. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM3DF2251526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f4a6ed990a02a96200210a79562c58e9c7d6788d437ccc0c79974d91c4f3df. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QM3DF2251528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9e06ec015a392c35e1ff96488236192c30d4789759e7d2f01e6db0f0e19be. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:18Z), 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/QM3DF2251535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f421c29ed5f0f9d613c34c70447ed57b3724304059511335cf72044056fac2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:46Z), 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/QZDQH2390535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42713fa37b4c066ad393ea93c9109bc66bcc680bbd9ec614dac9634208871731. 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/QZDQH2390538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b6acf57ae38ba5f60e968d837eb6a261ac305b17e5dbd668e59ddf29c714b6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN42463143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c2d5ca8986bbf222321ecdd42dde1c15a0fcaeffe79d3b4b64e01ab4addd6c. 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/QZWFG2409425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8730cb4aca263631ad0eb98d8b20c51f6fff3afdcd82077552c5613b4a7d2e4f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:08:02Z), 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/QZWFG2409426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ce22bd7b6682b6d9ad71c02d0e444ba4c955b369f59721fed4cb746efe7fe. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFG2409427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fad70cc7faf1ebd887eb3ce151aec8672ae2c5f64ea68c6df4b1ddcf95bc45. 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/QZWFG2409429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e254f200c49974ded35ea2acad37156e9568cba1115ebb8b5245af6338215fd. 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/QZWFG2409430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc51f80b220e2c2e9a7190619ed088af52b3bbe0626c4c45c4cee5532ffe719. 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/QZWFG2409431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c24e41f254f3021b908307de7269afc2e35f663ef52b42c4aaa2d7f0fb34ac. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:19Z), 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/QZWFG2409432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eed0f7de7db2c3ce0d95ce077ffc550b52321849642499e6889f628c52310c8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFG2409433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ef180b8c8ce2e850d9ca7be1f89d5a27d8101b1b2150597d82c958a872f573. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFG2409437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7467eb1100f77ab83f5a931366ef84c4bbfed1f15a78eb52643c4a6c6e3702. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZ7362500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21c285c1220470097e2c678225af9d7cff50707d8c711b0e9f212fbe746c9c4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZ7362500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95660e83ba4c9183986fa91131d08c3da9357c649051fb1eaa519c6c36b44276. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZ7362500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900c19ad1749b04f4c14dc05b1a53184621b76ea3e355abbfcd04ac99dfe2640. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ7362500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e00b042c1ff4c8f4126b50c9970720fc2b07e64955c0b2c9a2e25168de84855. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZ7362500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e33307ed02d2228eea499c33a7b1aca900e323d5a85ae851928eded9d43faca. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ7362500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49afef7acc500a346cb49313181e028989d2341810f775e0518a36000fc688fa. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZ7362500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb92ad0651d4b4bf2099e1d15aae4d56ef0541f46714f61f337ad030c437266. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:39Z), 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/QZ7362500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181d0f885736532216ead3c06b4294d1484209b49dd8a3f6a18ff6c4b41884c4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ7362500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97315dd470a475050326ba894f8a61df2862c6dbf7d8a5f605aea4610a2b6c34. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMANG2201117.