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 0xd18063ea58417aa57e93d75b4988c8da73aa8035b1e3747dae7291c5017ff39e. 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/3e42b7ba-0381-4a7e-be85-c19ea55e1189.json and https://artists.proofprofile.net/proofs/artist/3e42b7ba-0381-4a7e-be85-c19ea55e1189.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 0xebf128d5645d7d9ae5ba8a74f9d33f00c025a1562fd763e73dbc12b7d3429e63. 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/BCD592300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d869ce249f0a1ecd42f130dcb8209df936d9f843710d6c624ae530d2f68fcb3. 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/BCHFD2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95825562573f92618bcf149b861ba8436ae11c4296454ca9b1606b06931107d0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXVK62300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10800f1d84c83bc377a544391165b455d71feca32c6ea493838bf183bdb16479. 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/BCHFD2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d49d1eb2d9feaa578e53b7410d6edef5a7a3786e9a72b0864924954d36cb2a. 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/BCSG12300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf128d5645d7d9ae5ba8a74f9d33f00c025a1562fd763e73dbc12b7d3429e63. 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/BCD592300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99235e4a2adf1025898fe154a0ae7296a7542eb8dc2c7e6b71832a6efc580e82. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/BCA2A2400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f2e900d316eb5f6ffbdce2a50489bfd19b2ec947048a41b0322784fb225d18. 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/BCA2A2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2461a72c2956aa02c002d00787fa30f2a0fa9c969fe7cc9e5a39da0b05bd4d. 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/BCHFD2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ca68a09b88a9ef9133d5517292d6a85a82d10968a8c657b1108cf6b8e4312. 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/BRSVB2400862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73342ee87bca801d6db25e9f92b1a9577b6c686a5efe9c1e3e02cf82c63c63f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCHFD2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e54322188b8eaefcb37e2bbd605be7e62a4b4265586c702185fbc9ed9ac4b2. 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/BCHFD2400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a47541496f515b6046199914260def568497666ad821c085ef693e0fd1c384. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPEW2555186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1214d1c41e343e4ff3e73fc1217799b188dad0943db9130b0516e09d692029. 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/QZPEW2553193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7b5a4ea67fc0eaee4b5c1a0092dc5851f74183192bddabf42747096eb3617d. 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/BCHFD2400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d71c017314962debed3a1bd1da7991efd5cba00a363ceca4919107c3408b40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCHFD2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53c3d7704b1f7020b3739400edfab503bd293f49c9f019db4513580c065fa69. 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/BC9CC2500969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa662ee0905dc772413bbe98af6ffd9bd05ba648b97437b2692bf924982dfe0f. 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/BCHFD2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526c75340c3f457ec9808fffbc005ba31e86b53db4694d868372f5aa4c83c70. 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/BCHFD2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa064aa1f705a1202149e3159f7465c8162f71b32056ef8def424004b3f39d4f1. 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/BCHFD2300189.