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 0x9876ac2a88ca7b342416dc9de94b1d5ce7fc0b3d2169d483d91e4369452183ea. 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/20825299-c702-4a03-ba7f-38b9500519a5.json and https://artists.proofprofile.net/proofs/artist/20825299-c702-4a03-ba7f-38b9500519a5.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 0x58eb7404f07471c2e86c152a12a1f521e57f4a23d85b61b706463fbfce191e0f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR10S2155046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4e7356ef8a0a76788db74ef9bfb460e85c0487890e8bbb290cdad7cb7f20bc. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FR10S2155076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf4cc3bea2d029a61bd79e06bf2b2a4279cfd0c0883ca55207b7883ee85e6e8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR10S2155089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45be0d0b4dc6a13290fa9ae6c4ef670bcdda9c7e1536fb7786b6e4f56b3e5965. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FR10S2155088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cc20d17db9eeb0fb860ad145600d81cdfa2dc20f3c020e44460ea6fe5d273f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZN882244758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec5fe6b5e35539b17b0d2f5bb21aeff79782dcad82aa92df6acb6274779678. 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/DGA052263399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434e9b2e81570badb9aebf37fdf7aa935c496276a2defb95e1cc1d8ff12d5c67. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/VNA2E2210404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332d9180b64502db9fef08b420aee093d865a0daf99da9ac6da7ad2b1792e14e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/VNA2E2210405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79950da33d4e57382c49a2008b65bd9ca5aebbe1c3b42447cf4139753915f495. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/VNA2E2210407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf154d879780d03151dd77aa53b0bef9b7d1ee94568628709aface8248ab866. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/VNA0M1930292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b40b1ac169516e722462b00a1be34c906f53b6fb074f01bf7123c90048442. 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/VNA0M1930294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39e8751bdb3a8cf32186ad22ca15ab74b1d58bff6b295d08f70401042528576. 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/VNA0M1930999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b46de37770ba42c212ba7ea5c8c6f3c5168a8d0afa5ac78377739128de9ac04. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/VNA0M1932137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14120572fc390f7f3bb576ce1fa4409f7f6c3d4d20bfb22120a17ddab2d8e01. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0L2310287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd4848fe15aa9b3cc174b69aef593cb7b45cea840011bf6750bbf08f5164d3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/VNA0M1933053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248971086255bddafd2f7ed50e46484e4ba54ac19a756f34560dae5f9429d52d. 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/VNA0M1933055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf2ca1c773d2f3ec5cff777d97f22f008574d6c3059c510f4310ed3ae936f8c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/VNA0M1933056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cd785adc62dc0d092d8aaf5d88e0c244bdeced67061c801823e41ad55b1c14. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/VNA0M1933057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7bd62726b45da04a67f4918e291dee9ba4181d61b7cce15cdc6e90a67720bf. 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/VNA0M1933059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4eebc07310ec2eb50a39d20a0c5037c4e0311095b219ab6a367250c191ed84. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/VNA0M1933061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0aa12d7148a9fb60e8480246da91abf64c4429df44a7198fff995952e5f88d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US38Y2424604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16d4a6dfecbbd2a66e11615e7d25859118d3422bcbc124fb3b73d49da413626. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US38Y2426801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec311dc7d59d4a390b4817132b216ff37450261ebbcc70ebda055cf32cc21c. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/US38Y2430543.