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 0x41ba7b34559ba336056bfd4622de00a4ba931a46dad4011536c67a0d6455ecbd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63bcb47e-bf68-4ae5-b259-a6e02eaa715f.json and https://artists.proofprofile.net/proofs/artist/63bcb47e-bf68-4ae5-b259-a6e02eaa715f.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 0xbe859f73240b8a588c0caea7eb04fcbc370722307e2e5bcb8677a90cc669c00c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:49:55Z), 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/GBKQU1649057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6151570e521aeb2425688439c7aab8573bdef131005c79f0cf4ec2d634314b77. 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/GBKQU1649063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0eb5ed9051ddb4910a0507dbf638c0da2b4f2d3781a296bfc11b942c5468a1. 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/GBLV61923899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0eb5ed9051ddb4910a0507dbf638c0da2b4f2d3781a296bfc11b942c5468a1. 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/GBLV61923899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170a013f009a3e91db9df0cad8729d40eba69427e50926c444923d00eaf8e4d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLV62002369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72212a70095b6069902eed0fb78e0c6358e84135e1ab2de80f57696968c6b1a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:41Z), 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/QZTRX2281449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f000ba70d49cec5be3c49a484e78cd724e25a86b7521da164fd5ab7d529663. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTRX2281454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052a852f87885c6fb5ec75bd0719942388c5703f77900cc9e640d8c69f1aaa5a. 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/QZ5FN2399721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9477b7879ad78d73969d21ca3024dafe206ee7ef0b98a69adb5cf8dd04e1403. 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/QZ5FN2399776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd770f3194cd9040e8a9937d8ba13b9acfc5e9e6fe73f496a97f53c1b07742ee8. 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/GBRKQ2430914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c48aa01260261c41572bac6c7dc3bddcbae57e7b7f7ebb4d6bb5162dd7387. 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/GBKQU2461582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75646e9d94384c01689e565e3873aa3af41eef66c4c0d880c0956abcbd6c6f21. 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/GBKQU2492068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc33a85a34b216badb5c8f0968b23ca718be8bab910f6fe80282552060e303f. 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/GBKQU2492067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5785736ad758eec59f748754f13e8a7232c2dc8ce2924883180fa9994168519. 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/GBKQU2504240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7734edbb72ed37c2037955eb47124d37177f836d38d561468a46616096e998c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USHM91293443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce648755ea5b2705c8e2f654cdb50844d4cb4ee5011d27c708dbfe8db9415b4. 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/USCGH1429553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed6e68d474e067ca312bc17e793986e408af362196c59550d1701003de695e7. 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/GBLV62005727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c3846bfa658c20c5ba1909f1da8ad73cc58502b3e68b9be45aeaca2a02c34. 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/GBKQU2034739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869572d03a69e053d85c8fd649c9c958f04cf683fe835bc4703654dc048b71cd. 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/GBKQU2029096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ce295b727b5ac6588dae3881dbe51799960c2896b6fda61483db64de8e5792. 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/QZTRX2408984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7734edbb72ed37c2037955eb47124d37177f836d38d561468a46616096e998c. 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/USHM91293443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe164d4f84da6584cd298c45729bd84555692d52b3b20077b4734b1e3a52c85. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMFME1951163.
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