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 0x036913bb3873bd7954cf21058c7cf2d1dababbff2706b0f2ed941694c099016d. 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/b5394532-00ed-4919-9300-6522ee8ad3c2.json and https://artists.proofprofile.net/proofs/artist/b5394532-00ed-4919-9300-6522ee8ad3c2.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 0x449cdcb692c98e0e328aaced01740f91e29af8b736aff0527f39f794304fa7c8. 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/IDAC52001557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0677f3f8c13cf4f4a564849614fd8b2069540d3d8a47c0602e547e3bc9e07ce4. 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/IDAC52001558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14461e0644a236b017fb15bb0701348e0e55bf9140222167ec7cc23dc880138d. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/IDAC52001564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632c81b6cdcf6fbafea934cf806b16d79585aabd5a858f1eff5f5bf7b22074a7. 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/IDAC52001566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323fa8683c520640482713521246eb9ab71169e401c6c0cd9bd0e1c35b7a14d0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IDAC52004064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4302018bc53a7a7cc59ba27bbc98c2464a63cc10127dd98c8c0427aa1b995f. 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/IDAC52004068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10effe0b53c07185e164261bd986a3cc91eb35f59705ba37e30163162d2fea2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDAC52006304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2851663b231297156f0a661477ad83d9d6ce7ce3ead7fac5fb0438bd678d04. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IDAC52006312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36051dfecfae8499535db53558bbd3baf5c59228ac90547ef1082cacbbe6121f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/IDAC52006313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e41b27b8d2bbd25722359752c71bb8fe9eb6c26ad2eb113f8488bf0def6516. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDAC50800335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab8d96d533b28a4572ca97620cd5c5449dac789a56169667195e045cf5ad9d2. 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/IDAC51100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c72df95f9da2bee3138de71138e7f12f3a5c2ddc2c439af30e77c33acec3cf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/IDAC51100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aceda23e2aadbab8c432a367bc0c00b7d559a9b907b49d3ec8afe42a88dbd5c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDAC51100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc66ca46f75f83a2a254730c49a48b54b13993d0966aa579224c62a6ab93838c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/IDAC51400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12cb603dc71a42614f37f98e2ff47fe85af53607821229f9b824f1def984381. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/IDAC51400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e01ad5ce5df271de3f8a1d2522c7da0ce556a5190f9fca4acb0c56756f426. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IDAC51400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b39927e838c9740b63f261c68bf446dc9bc9e26b3af86c66cd9c3feef0e36c1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/IDA391700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fd7c1ee7896f03f88b057ede92f92b35bb0b25bd10a337f35c798c1dc96e37. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/IDA122090001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fc6f77cdb5b6115bc62143790394c170b738d5c8df75f657fce80ce62e908c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IDA122190003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3128eb12a853919ad33c74ceceb5cc63483f4964f329633b2ec0add84ed623. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/DGA0M2420853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6913d69608d2ac5a130e2a7ade6528467fff2dd3b9103fffbf2d310540692b27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282587450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180ef03aa270c04f293bb465f00e38911061099c2fa27a7642273ecb389eeb23. 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/IDAC50900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb85131a269c6adc53c9d7d433e3ae2dca27ca3426ad4076fbd2e89cb2c795a0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IDAC52006532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6624e4f6dc7b3e3d9e7ccf9fc179f854a4289c96e3f00d3923f874af6e360263. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR59R2097802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06efb46b1f9b3e12df34c09a805591972144c1ea3c0bb8594c8a67bb02b74c. 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/MYSM10600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297d91b6ef8ade6b3118cd3b46cb707e23e767dfc163dbf5c080d01cf2c5ec53. 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/FRX281937429.