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 0x8a4724ca085d9095af121a69f33ed0d10bf254de64d3ab04e16a18857d5645f0. 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/69b9be43-8e3e-4d70-8f00-2bde963a79f0.json and https://artists.proofprofile.net/proofs/artist/69b9be43-8e3e-4d70-8f00-2bde963a79f0.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 0xec9f192a3e1c982f7cb9a0e1292050a5eb586f04b9ba3872b1bc83b91bc4c963. 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/USCGJ1528628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717239c15aa245bfc379a7e958bc01f29fbc353f56f7286ed2d5c0b1412c7ffc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:38Z), 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/USCGJ1528630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a829e504c4c53c51f6d7f4d5a2c71187509a8ffb3b226e51bb9f9d3b745bae2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ1528631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03405d2ba3898906a09fd1884b8c2cc395d843a59debcbbe445c9a3d5aee85d0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5BU1768808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e5103741aeb5864fc16bf58ebd5b462ce571600ef9c12ef07e701c90f9b708. 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/SE6QE2305011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2105453fdaa59da24160313f376dd3205ead0d16927e9e13d966a975cfcd71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKRZR2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2e51d2186347dc87c395fd56ecd7dc1aa064d0b72a29dcaa4dee1a3dfcfc9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKRZR2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba81ce161c51acb85f7d5e18bc9175268813faa79ac734bb0318c65bf62f1415. 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/UKRZR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d7fd5b3217580c754a1b2bb5ab6f0969391836b33580fdd4abd833d96ebaee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKRZR2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20093af71149873465c4359f0f463c318205617e30cd267511ba49ef745ab55a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKRZR2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498eac45bf06a805e75ac563497ae14380d0fd15d9364938196bd2a1cec78528. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKRZR2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852569e85e3c385ad449d811008ebeb44ec77d8653528a0898a6c77cfe64968e. 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/UKRZR2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd87f17e72004fb1738052bab9a142fecd9ae91d76533b83408f5df3a290334d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKRZR2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45ab9a909b29655972669e450f0e223e0562697fbfbcdd7c3663df4eb3db4e5. 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/UKRZR2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b559ecb64cb1adb5f6ddffb5c6f8aa1207e6adbf74a8ce42ea9b0ce1fab5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKRZR2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2105453fdaa59da24160313f376dd3205ead0d16927e9e13d966a975cfcd71. 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/UKRZR2100001.