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 0x0dfdc765d931340b8d3250dbb2b13c7c1244e134634cb119445c203d2f4faab0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50834708-eb37-4617-8852-24c4aa7d6bad.json and https://artists.proofprofile.net/proofs/artist/50834708-eb37-4617-8852-24c4aa7d6bad.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 0xffa84ab52872470e6ebae42f3428c24a8a3adaa6f62e4605110831434e230a3f. 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/GBRKQ2162790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c4f953305ea216940be19f4c23f7827edd60fa0af248e33215f3fe803e88ce. 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/GBWUL2123904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74695b986d005d20402dfd90b003c7a3cb57db26720dcebe77d5be97e1797263. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBWUL2123902.
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 0xd3499dd2cb1755971651da7c9a362c03b9e2f8ccbc5e5daf2933710472d59b08. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZS642188477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fc1a71a8f0d7e67d19e3c2d987cb76e1aab2eb147176f47a1631a39c868743. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLT2H2200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bfd8765463c69116f04274e05c3ad1ac7cab3befbff9423a12fdb6789a8bbd. 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/GBKQU2240309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df4fe7b6ef691214e63dba458a6e6e58140ea935844eda0179535692527b781. 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/ATEK02277372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac52371547b536835dd9047fdb1ff2e76f6d15b1e2d41147c746024bd61d9bf6. 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/NLT2H2200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ac4da4bfeb43becc1be55b0b6591a3e7b7bc9d656f5776a10cb695ffc58e8d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS662228126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f660064597ef89e0aa38b92406634171311f3599cc318f824372e51dff82db. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:23:06Z), 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/QMFME2217327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9cc35bab3a6f9fe8dcb5f1952614ecccdf46670b8aefa045ff3d40dce5c46e. 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/NL2QC2100868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe201d024c74c6a72dba2997f1a4e9b21d7487d185ec69546c7168e26094d09a9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:14Z), 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/GX8KD2380654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b28db3ed96c86e163bb479b2c87a84a2af55ac8c85977851cc44c6edb7b1a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZ5FN2373218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90876c42be9ab37176ef25fc13b25b97746d6b6a1d80805e3eed0768d4d95a0f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:42Z), 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/GX3HH2300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd067ab712d0b4bbb10ac927def882b91e99696d9bd69dd113e6b666aa13fd8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA082340940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47554fe96731f9c99d67d759596b5c1ee35fc9533c3a60b84b09ef279f2cfb75. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/US38Y2309965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f71dc92a2decb4b4a76faa71dec8b3ff39018f2aba8fbc15e780f5fce1448. 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/GXBDT2346307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5094d69eede5b0920d04b59c768282401e1211b1dd04a5e9ff853e00d360b222. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ATB152300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e2cab4b7a96b10caa763812a7db581748f0abecfee75e62a54bc12f0cb48e2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEPI82412969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99279ddbc6dc48960d7338c90a55d6fe7dbd032cf515fad2e294e203c85b9a6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/NLRD52417702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32fb347ec44d8c119c6545456377a72e62d81c3bc118ddd733636b9edcb2743. 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/QZWV32469484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a5b83af25f4acfe652256885923f44194d696104a8e287e0976e85228411e. 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/QMBZ92491393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250e659606ce4c836297e7a24b08d69487ca643ab1d0a143a98d4ee0a3c9e952. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZ5FN2520843.