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 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 0xdc5097040ea08b315376a966672756ffeab72222ce79a9a076ee2ce860316bdc. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afc9ec93-0719-4303-8e2a-daa359faf9bf.json and https://artists.proofprofile.net/proofs/artist/afc9ec93-0719-4303-8e2a-daa359faf9bf.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 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 0x1d60af62fa4fd8fe4bde0a0567032fb273375bbd8e1e43328434a1422fa6f4ac. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SE5752447279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0a87d920759ebf920a301d23b3f8f773082254dcc8fc6eced2b5fcf0d12e68. 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/SE62X2504501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fec250afbaf4df6614bf5bfbb4865db7640f9c77db607c56d7c5f285c60f64c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE62X2504901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed8909eb0c426203f66e525fa4385ef71fdd8eeae2f13eacc5c6ad1cfe24f61. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/SE62X2404802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226bb255d5bb17e53ae44b3eba0a57003c7ce9fa4aa283f0ad01602b19dc67ff. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SE62X2507801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17573e5982369c6babba17aa479379ffb00957b2f67a8a5277d7dacf6511089c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE62X2603401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2af266b19ae7a6a80394b2a45fc9ff43ea2d8428cf6d64d840be629a006c2d9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE62X2608901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb26927608a64d168715fd08e5dec3b68b59790eee10aa4da41b3c428a9eb2f. 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/SE62X2606501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d279b42e6e7dce9976cb1643b0684f758717d96b9792a671dbd723b71cdd5c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE62X2609101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b051391718ff535c3c1047b33a5eefe9ac84cec17e0e4aed2029dc8699e4e2d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SE62X2609801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce5641a2fab0b651c668023784fa93046ef106f305b809d635b8a657dcabc91. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE62X2511001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe396b6758f7a4ab15b72d35e3c2bef3e443f518f151b31e48b6b2889c2ce3be. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE62X2512801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c57cc7f967923cde995087a5a6b0166d43e228b28f7ab3c4631f2b3ea463c8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/SE62X2513901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927803cfc3978bbc6106f26cfd8789ddb4f0b28ad38c546f83d85b099cdc32a4. 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/SE62X2526101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac769ba378fe107b8c7d9606f4edc4a1047e5c792842f24ae62375bfd1fefd96. 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/SE62X2526102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e98450e3242748908ab64ffb40fc55d9d27c8208f9989ab7bab8826ec2048c. 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/SE62X2526103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa15a54dfaa0bdee014b1f299c9dd6438bc7eeba9e303e03bb19010568b0cdf. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE62X2526104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e583df399fdc6afa07142b6273bbaa5037c4363fd2ecb578a21312384acf410. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SE62X2526106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d320fb8888239b085c6c6588cb8c48de2ceb947c1118e4f6fd8283318896bd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE62X2526107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3554f4e0dcfebdcae7f1e3351f0d6e64d099848486e2fbe662a127fa0f160fbe. 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/SE62X2526108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f9b53b8ab44cf49d061e3e1898f8c3a8dc149d88660af67ff0eb1053c8d7c7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE62X2528301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3d2ff8d1b70d95fa4a097fa8038bc419fa5c7fc8a72d04907e3d3f1bc00514. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE62X2528307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fb884d4dda71465c1fba6438d59842e8f82661892562af5b1f862550874223. 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/SE62X2528308.