thumb|300px|Mausoleum with two loculus graves at Khirbet Shema' on Mount Meron, dated to the Late Roman and Early Byzantine periods, and identified by a medieval tradition as the tomb of Shammai. Sha
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 0x10b72da615dd1cc696e2eb22ddc221226c9fd85d79bc85381a32c8d8aacbe836. 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/32a54bd6-2756-43b3-a795-01e9074bf4db.json and https://artists.proofprofile.net/proofs/artist/32a54bd6-2756-43b3-a795-01e9074bf4db.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 0xd38664fe14d7c9228bae73cdb74b83e37860cb0d137982e02fa8e5d3ffff46e4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QM24S1909402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b4d938f594f7f16ac1d6463c96cd2e3bca1671dd774b192fda6d69b17a9387. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6P42036554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de9ce6c88a0fc98fcf485f0f17a9ad7b81f03d080d5c6b1350d2fe247f2826c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM7282056612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d1a64eb7046b988c25483d702e8f5deecd929ea739d3dc7211d35b4093617. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QMFME2128404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f786871f15c9499ef965e470b411341e1f38abd8754b75d6e1f1f39d52ccfc. 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/QM6N22291950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f786871f15c9499ef965e470b411341e1f38abd8754b75d6e1f1f39d52ccfc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6N22291950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80735c1d9aedd810391f40c652bba3ca137e40b2c63a31a4f1b3ccfec725ac79. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMBZ92270306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3179d99ff1f57522665d309fa0e6a4e9ce719afcb06504e66280c2a851630f47. 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/QM7282369475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3179d99ff1f57522665d309fa0e6a4e9ce719afcb06504e66280c2a851630f47. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM7282369475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00544ae9e919b2c81e1e094a3f2f62ddca245584b781e2bfd4eadd74296349a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMFME2389871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68707618bdc995df00bc1adbef9162deceedba960b996959aa49ca598359498e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QMDA62371775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf939f6dead700cb0094d84f68b809662918a3c2e4281fbf125a34ec74c23be5b. 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/QM6N22580592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef975bfb15b520e4e0b2068f33a917feec8e4bcb2817724aceb39aab89038874. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TX2459113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b259eadc8f8ca48412897bea01531a325a11afa70cf167f9f4b31afdd5dfecd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHZ52242284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a8461e7c9678546486ab14838025728ff3f05f90c7721c15e10bb641ffbd1b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QM4TW2032503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b403a32727f6da70b0c6579ec77b54b2775c9fd4dd50df006cfb1ea7aa08f9. 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/US6WP2300276.