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 0x042cf235f9124078999ff3f84a6fcbea827cedbdd2f2f6d039599239cc40b258. 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/0f159f1e-6470-4576-9181-4ac150767c81.json and https://artists.proofprofile.net/proofs/artist/0f159f1e-6470-4576-9181-4ac150767c81.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 0x9760c126fb514d5a817352c6143c31095e29ed64269d804fa14842d0101f5098. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DELJ81826513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242618ae5dcdb42d827855c97558d2a49247846549b05f2ed69f59e0656fb2ce. 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/DELJ81913727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac236cc864cbd09f95638e0760bb25977fcf23cb09aa3500dd3f8280b32e6f1b. 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/DELJ81951265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02560c945730d2618ccdb96608944e7bdb1504458266f1e3eef548d8388b94. 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/DEZC62107092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4369d7a15c1616dca881bec73dcc21d730cebdeb6bb305b9ac0da13a73695be8. 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/DEZC62107093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35c39d1fe9a08517deaf1c985e208b36f157a0d9dc7ea97ffd6d98f71ddc69. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEZC62265199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16e9d8c2aa3c19f8b4b020d85688e87842bec3c0c7f251189d11cf6849f5f1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEZC62255337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a22c9bb906a906140fa9d540257ab70de8565136d7d8503a04ab69d5f468b1. 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/DEZC62207489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ccf30bad0427920f30740ea2160bf0063bf1d282a634aaa3dbbfdaa6de8ab2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEZC62342239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde26215a528a1e474ea2c8862aca3e959c219da9ebca8ceb90d0e43ced0ff583. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DECE72401358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebc5ccb0e6557d0ef55f2bcb94bdad8d8d6a3a6b88bad9564e0639015d56feb. 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/CH7812181009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea23c815b7a38fe7aea92db3d7f0cf9c41d7b6620754ff1bff34da9270a1b2f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7812215877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060a4697e64be30edd0ef40123d666d467bf78c9c2f715b19cbb26bbb1433665. 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/DEZC62261018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea23c815b7a38fe7aea92db3d7f0cf9c41d7b6620754ff1bff34da9270a1b2f3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH7812215877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b030bb725acf8afb2f5c03478de33b8136f8b74032b8ca13475bd309210274. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022290116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd464875526b7073847b02c5d22ae795a2888020ba23b4f2cab466c5ee9077902. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ATEB12303702.
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 0x3efa4d815a7776c2d787d53756e675d74ef94dd12d3b6db0279a379656558d55. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCADP1871204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05725730c37632cb88307d11ed60848c57b1bb31d44c638deda333c41c0d4d6c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ATEB12308401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd512a4196cb74445559b36f957c7d8a0a20461c29c9335675776d8ff8623b810. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZHN42101667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedefb7c7beb3f9de0f9eee681caea5c8ac6f9d6aa681d102aef084d0c0c1d885. 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/DEZC62261012.