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 0x6444f4b03170d9fa3882fc5aab43f2f9d427929cac90a07118383a762259645a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4082d7f4-4d55-4f7b-a92e-04f5b1153e90.json and https://artists.proofprofile.net/proofs/artist/4082d7f4-4d55-4f7b-a92e-04f5b1153e90.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 0x7c99786a7b70a5a97a1ab8228620b127fdcab1c08d50de3f17bd11cc92ad4bdf. 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/QZTBA2340335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fda318b35abd70ec8df72f0f624d177a37b4fcab3afcf8136f9e24685b00c3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFH2380390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad37901db7bd6049d1858b3de1b2009fa57ed35ce23288970749ec8c0e49603. 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/QZWFH2380392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e74748af34bbcb39919a1c409f78b86e8ea7402bb52ce732532bdc98a55bbc. 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/QZWFH2380398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab01c68ac78a9b89a733887df5a59315164315a4a5d47b187909883557670d49. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFH2380400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c66672df6f00e51a5d83ef4cda886ec74c0b4a940a576b5b427797f872c7fc5. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USY242412571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f20e49f61e72804b4315e6110a76bc21d1cbd20f646516f40387d5b8e82cd. 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/USY242412572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6184d4416d03ca8dfb5583103e2fc1b7b0b333fdfea5cd87d510f3f93cbcb50. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USY242412574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44bee81aed2f9d511c00888b0b266c94dfbef63e06e2bc89c347a62c1deb22a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USY242412578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f291425cf3df15007e335ba5d6f29bfc3279347c307e994383e5bb6d6f3e3. 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/USY242412579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3f77ecb6df63dfa9eb7d084aeedb68ef8128e40c44709b854a0cd050a79345. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:58Z), 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/USY242412580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea479fb2468b622778864a5eb483ee03438ac38b6a18c147e897f31e0bda988. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USY242412581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691192ec8c47ec6ef7c1f4fec7179e87b06dae4185461935f099a3a20229ee7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USY242412582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73524b0d68f8d3cc5bcd7284f33c32427bc5fecaf3b388bb56537d0ffe0a77a0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USY242412583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ae5cfa18905672c8c8efeb5f589065e3b5e58fda818bf96bc58b6349fc1389. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USY242412584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6765d96244e2e7598b9bd1200f42232d5801b788699c7eefcc54cd605c1d31. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USY242412585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffc77c1920d6e040d21535c56509098c66157c66fb8fbb6259497dc1d4bfc76. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USY242412586.