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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 0x99224b7f8f11e20b5641ee0e81297650abd489ac40a5f3c5601fb5d5bc6e0e1a. 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/94c56519-78fe-4cf6-a088-0ff34871a98d.json and https://artists.proofprofile.net/proofs/artist/94c56519-78fe-4cf6-a088-0ff34871a98d.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 0x31a7184be0e85959a2b8ac0206835f07de6aa4c157ef6065719b836b0fb34489. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPF1797597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa338c3357d91d74c3cad684b413a43143153b25eab6a87099673d4c1d8957a0b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPF1797598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c93b2a9ab99104912e49107b4644f1e18d15c1b8e9ae9134292ac50983cff75. 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/TCJPF1797599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc81fe7e3f09e05ffa804c00caed0b3c1b059fcc4e6e7fc1e6fb4a307b768d. 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/TCJPF1797600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca645ffb70676f515d95759ba4013a1f380cb5ce8a86f2c269168c53407754. 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/TCJPF1797602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd865a33dc03b412956952dfa4f4e03a4bc5d6d9a33c530fa37082fac3a4508e. 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/TCJPF1797603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34a3cc926f34dbcf55f14c10bb3d1de7088ae2aef6b5233bb053393eed73abc. 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/TCJPF1797606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f6e5f6447c9e859f3b53401f4edf49961e2adadd79f8fbb7d4b54ad6e4f8f. 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/TCJPF1797607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7ae46aa8eca5c6ea3b7a2d0351bfa8dfa6a104339de9f70535662ecc28fa1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPF1797609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246a84335ea9bb02b2cbc67a15d667a408c2a1852d718640d9756953b459430a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPF1797610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224161848be7c25a64ea596bcf0d7f8bd6ff58e5dcbef0ba2756ab47dc2209e4. 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/TCJPF1797611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43d02ea6d2f1696c45962b916420cad287f627f0030679dd3bb082b7ba8c382. 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/TCJPG1863691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf38a1700066be438ddf057b17cf59fab9cd7d078032760be7a78b45d4848e6. 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/TCJPG1863693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c22022f7399cd58c3f83a802e2fdd226076e5666bd4dfcaa05b782feb0ee15. 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/TCJPG1863698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a963993682eb3e855c493052b4274a972a292449dcbad9a3fb2764ce63ac75. 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/TCJPG1863701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eaccef521f5f0ee18b950176c0381f97cd3c9c509fd382719234ed22681e34. 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/TCJPG1866525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc596c90599e3e2a1dd8f805a6a4ff0c64980b605d544fcecd036d7ae306fce17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPWP02300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e8f800b522c88aace7592ad6eb4ff3097c80d843a6eaef59b66f33c4ff4338. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPJ222202071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0691340708a7a8b805c88f46d5a61df06e578a4d058dad70ff767272216ee00. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPWP02200376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ce46cf7555e6e6f1dee86aa490b1faa747f7a46fcaf64877d877211958594. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPJ232102705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1c5e16ad3b896f8194a80a341c2bfa5e01fe694509e45209efdaeb35bd1f99. 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/TCJPJ1965988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa338c3357d91d74c3cad684b413a43143153b25eab6a87099673d4c1d8957a0b. 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/TCJPF1797598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7ae46aa8eca5c6ea3b7a2d0351bfa8dfa6a104339de9f70535662ecc28fa1. 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/TCJPF1797609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b183591880103850d7e8ed537248d694d20369a4bad8173e4a2d4436e6f454. 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/TCJPF1797626.