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 0xffbc069d1506e3578fe817a3acf1a2ed3e5b2378f1d55b197afaa688e86514f2. 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/148716bc-7519-436d-bf3a-19b9fb9f5f31.json and https://artists.proofprofile.net/proofs/artist/148716bc-7519-436d-bf3a-19b9fb9f5f31.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 0xc2e8679c4ba0ddd70d867862a835e2fc9a9dba47a396a336bd58691d8eca4de1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCADT1841043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82016fcc53001f319f1a94b2a57a271f0e10cd50e6705ca0a162edb674168c08. 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/QZES72179161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae20d88a997882dd89098ab84902a4fd1f8fbf20b3ce49721edaadfe6725f6c1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:53Z), 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/QZES72179165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933852fc362dc3f21fe338d5e77c0b559850f860999b2e53a797e3dc8302d35f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CARFQ2100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65dc9137a37dca7536d6c4cc2496f08ff912f2428afbabdf325424de327d2e0. 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/CARFQ2100379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588194d1178fdbaf3d5becc8e2c5866b3c35f5c4aebe2cff33556dd8ff39bcd7. 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/QZWDE2227722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a6a5507a4fd3bef47e6839a76894021cde0a9ceaeefda0a360e2b9ea36beac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDE2227736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215495b48de15bc997387c1149e118ce208c22a69bf26a0f71ce83aaca08d0bf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWDE2240460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e66014d421466038701ece639c6761c7c6df9c5540f6e55866b0c2c2bfcc509. 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/QZWDE2240468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b00285f0f44500f67dcabf72221454301ab9ad67b562917eca2219968e1276. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWDE2240486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe846cf289aa771a92f979860d60559735ad39db8f4969f866d7db8252727d56b. 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/QZWDE2240515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2c194c9673f7c49c3f20ef4c07367a5ba593de5a72ae96387b05ad5d732de3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWDE2240598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eb3e23b3a21a9cfd69f658d09b842da98794b652338e3c157ad8a5d7ca9f0a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWDE2240477.
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 0x970a67311bb9b502b73d8315301894baa2fe8e02769b0fdb5960fdc27a0cdbd3. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZWDE2240457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c2e8b2bda92935a161b34fd1e99c877314f7b1f5a904e71e34f6f877a5996. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZWDE2240474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ff75543a5fdc115d39694c9dda2a0e6abd1c3bf387a183340dc74c7ae7fa89. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZWDE2240481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6321f71ff18f084f2ba2199adf114a1822e0514570792568ec5fcdcfa92572. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZWDE2240484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356d17fe78cf6868d31be040e99096235a4f92654783e15dec531a59d24141f4. 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/QZWDE2240488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079ee75d400972d13ada1b91bae6c1bb58c81fc69093ba132f60efea5ba22da4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZWDE2240511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17525cddb62399c83e7e0b54c05c28a6e644a7f48e34e0a19a561f5745643ead. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZWDE2240596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8055f30e453eeac5eebd38dde4fc5accfe5ea3e9cae21eeb637073498d8b62a2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX452334438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd7ab8db193a030643e62adc62c712e8a476363abe13670721e11f773866c40. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/DGA052326102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1a64de5b52bf09f134a960e09f160685d943455405621beae72dc1cc3f9b99. 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/DGA052326103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf752628e912ad371289c2e03c06d64a0eb3410d69267711ae461d81c14e91dc6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DGA0M2366163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7953dc5cc6f4250b0c3294f2782dcb328a3112ed92b368ffbbda22b2dc12855f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:18Z), 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/DGA0P2362536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f126598cdc85670d3d7bf35d43e8b5fadd99d2378236e323435d1d36308e5e. 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/FRX452381778.