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 0x9c796293760a1ff6815d98aee73da490aa35f8a203babbaadb173722f97a5497. 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/4601af70-4be3-4964-8369-f669c0d79864.json and https://artists.proofprofile.net/proofs/artist/4601af70-4be3-4964-8369-f669c0d79864.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 0xf68fbb3c4d39cc0ea4cf9dba6a43c6cd807556b5ee644912401d767da76855f4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFB2044543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019a66b9c7ff8c737b7e6d8970d57e3d812902a729fd650194e6fa45b5a06072. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US7VG2200389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb320bf193559cd39735758bc9bd5a0fa46fdc9292ed2b74782697198ba3f9563. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2252430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f1fc3be3979cdbd4fad2f53458e632e3ca2dffad8c51ca6262933e7e2842ca. 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/BK4DA2413759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967cbac8267f46438d5ee9b9f0d3fd515fc24b38c6de64b2686508082a087bc9. 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/BK4DA2424749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcbc26b8eb84b8aaa2be23367578321ec2a3ef920a8d36b9fb5694972f91ec1. 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/BK4DA2424750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ff1b0312fa5e8511f3fa9b6c0c475d48e6b78e76d6efce574140c4513b49e. 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/BK4DA2424751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fef562e5b93a5530ec84f5a049a3ce8031f212b616e8778b1bda81ee5962cd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK4DA2424753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099cfb12f35c21f27f629bad53fc9ad27117b05df660c73d17def0202ee6281b. 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/BK4DA2319229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe727c4cfc45dc7ff8055b29709b7f9bdb10bdcee26e699c6bf7b21ad0b856d38. 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/BK4DA2319239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8f5faf121217cdaa792afd73d35e2e0d03a9dbfd9a4368d593c4997ec3ddc4. 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/BK4DA2319241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba83661281c86519f0bcd413d773710cb4481d7463b3b30fc15b9b77b9da77a. 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/QZGLS2355464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2f2afd4b33675c7f5cba97e5e1fd59ea620e7d3a224b3ff2aac3d130b6982a. 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/FRX452432073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba95f9648aa0299942647ff1bb0615f215a9ae4b5655fac9fb50963850af9aa5. 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/BK4DA2464453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24bf613f3eb39a76e0072dc4f2c2888b378286f2d4c79975d8ac627cdaa0ab7. 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/BK4DA2315767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61821c4f3f7f27604c6acc423a262f8c3a012dbda923e3b1baf7b96874b327. 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/QZW9M2239178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8fc2237eb7782e5174985e8bb8160b183ab0ea61f59d3a036ac3b7b49c86a. 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/FR96X2444241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50aed237dfc3e3c39c66f763b0b7e2d73902cc751de9c9057a52faaccc9f715. 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/MXF012400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15273d09da00b0cee8a013fc33b189703cdb4be2e7f6129649711a2593cd3b63. 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/QZNJW2481160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2042cc803fffb7d4cf14783c2c755ba48af5936d1b9b79fbb74c60eaf122eac9. 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/QMDA72409280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ef04a60798cd3bb93651ad0352862a5e114a97cc58f35fcfb155b3422832d. 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/MX3192406702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda864f06f2f763609465750dd10b7e7846b9e842a155eec40a7ca9a4d9e0bbcc. 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/GXBAV2313391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135c66ac6a4737658ed268a05492022dfe4ec068d0a7ca92af647083c165e542. 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/DGA062446656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30df5649b361e1371f4fd586613db20093d6da26873ce250037fb02e5b51e6ed. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTBA2387822.
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 0xe556bb740be1d57ccf2380658389147e1ddd563a110aad54ff748d445d8e83d3. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/MXF152500414.