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 0x195b32155cf831f55dee99923266e85b9c450a45df6fd39c745b2be436fa6e1c. 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/f661e79a-395f-4114-9c98-927eec7fb5ef.json and https://artists.proofprofile.net/proofs/artist/f661e79a-395f-4114-9c98-927eec7fb5ef.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 0x12920359acfad19a260325fbf144f623934930ffc22d78342c87cd113777bc56. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE5BU2024610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588e7218446598ffe3916a9a17d0eac88f9351b5dfeb3cf4ea36ee0e653abde5. 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/QZGWW2142317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6523b1901e8ce2bd326a44425a36fdf47020968ab92e15b588da91b39decca54. 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/FRS182102335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f36d33f25da2d6c4f074532860a0cedf439b5c55993dd93a66980dcedfa51. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR10S2304756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6025779343fa4ef244f8f56d514e814483420001285380ad0d2c51b8d492a745. 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/RO2DY2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d1b56eaeb590b856f8ab58a3570afb2a3f8a5d4b42f2e06be74dde2f977c8b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RO2DY2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f3f3d2765ede9a43456da2d20023eb084d36587ca6bff54798b4affa02c921. 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/RO2DY2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946cfe8c17da6efd80bafb809b8b79a40dbff1d1589f69a4a3da3f2de71041a2. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/RO2DY2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18113a43c754f4333ef862eef9ff06c90931b72b8969eedd9c5a89df652cf355. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/RO2DY2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e4a49a573998fed1a872b8ef6971d723e2a97a054374b7ea2c00e97b348d0a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/RO2DY2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33902745eb51015464f8d8a2712dfa628ee01a0e609a32b1962b0ba6b3fe6ab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RO2DY2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e14acdfca4476dcd4fd2808bde19bf6d735338b61d6e5eab4b2946f563d77. 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/RO2DY2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3663033e8861462ede9f39afd49c9e6215c31ad3439f406cb4b7da5c0c1c839. 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/RO2DY2300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6f83ad0b3dd93e679f5647ecb25d36212a7a98bd65e5e46aa5ddd6b776d49. 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/ROUM72300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb62aa1b30f8aab64a1a5a39e19623f844b34e9f4cfe8058dfa7f51935b7d4e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ROUM72300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae7e2f68c00541d47c737af178c6397d0759830f673c0b5459c98df60525416. 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/DGA072384118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7816b8b9781719192cee7c8fd031d70a407540e13d0739eb2dfef7670ad75e0b. 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/ROUM72400067.