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 0x163e6179b492ddb6f06861e4d7e0255811c3a384f2ad7b4789e20681a00fd9a3. 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/265657e7-70c4-4390-81d6-580594957562.json and https://artists.proofprofile.net/proofs/artist/265657e7-70c4-4390-81d6-580594957562.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 0x36b4e3aede3d19fdfa8464c26dd855cedfa3c0660125c7141018eec304d31978. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ATLB11500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898728329bf3504da27a5367e91e7403207aeba3842b1ae94bb60a5ca9fabad3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ATLB11600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a0505a7d194a2302a68e4489078d93df9c5900c166bd0518aa4adba712581. 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/ATLB11600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a73b1fbb024d9de2b73fee0d4d80479054a4e8ab0e8afc7e3681c5d3776e4. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/ATLB11600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c6d4241be8357b575440d3c7f2086d15bb65914f89a1dca23629194dbf36b5. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/ATLB11600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f822772f054340e487611c9d11091efa690bcf99b09056ce96c5e7236c7acb. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/ATLB11600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aff3439edfcdd3bd3ef0727f7ecd038d36a3f0441704455c18d7ae9cce73b82. 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/ATEK31800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96119b2ab1f650c601026b653082b143dc5af96feda4c54142c1c96ab63e6686. 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/ATEK31800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39ec6256f5541a809e725150f213723090d33760c3b59eb9b3052ea9cf71fac. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:52Z), 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/ATEK31800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c502ee7a9580589413d5ccb6be184c02084b111847ff031afeda6186691c62b. 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/ATEK31800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328c92c867b67b571816e047970927928aac5c7909828c1ce328a65624b95865. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ATEK31800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca055f4285b514bd81985f2cda9b6b6ad2fa6c2c7ee97810fb6758879fddce4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATEK32200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975a1e94691909c5e07889d1a7d8ce998aabcba6640d5e3813fab1e9a8e9b61f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ATEK32300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841e79eca4c96da6aa1437c608cfc716bff7891645c95d51ccae3dd2c1b8aea3. 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/ATEK32400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c53f2ceb62bd3db9106e6bcfb5fe0de7a6390248845a9d91b5009ded0955fd. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:21:16Z), 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/ATEK32400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec44043a65f8e8a7ce816498e65a75fe4ca9bfa8d098bb23420f594a81f0e52. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/ATEK32400409.