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 0x0c3038afa28f74a9aa4107f1110c843c75477cebbd974de08faa0c781a25ef9a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05a10a37-1d2e-4d15-8907-655557b7cd01.json and https://artists.proofprofile.net/proofs/artist/05a10a37-1d2e-4d15-8907-655557b7cd01.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 0x4fda8e0666242ca702ec88ea7eccfca382d668ca1d3ac49f783209505662fe7b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ES71G2008480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9fbd1db8edd319509f783865bb9c24df4004a8f2607c3e61191bf38ec82df6. 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/ES71G2220775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29453fc3610cd2215a1a920fcef9d7b6b0811df8522e58bf5c6ce24b15cd553b. 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/PTBM12400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90114162fe97fee5af2b1de5cab423d31f36aa3883938960fd1480e082314d53. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:01:14Z), 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/PTBM12500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b04b67540ec03458b42e4052ce8dd849946278c68f9359eeebc51b27da1e9ee. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/PTBM12500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49047f46848b592cf9e779c4a15e833a780210748240e2ececa1fb02cb6639b8. 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/PTBM12400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5918db1e6acaf7e9b20b22f48c74ae4a2c890b00d0ce6ccef8ab76e2e967a5ce. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/PTBM12500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb594e926bdb2553981620183effc00f8fa4731c38688713014cc22744ae53de. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:59Z), 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/PTBM12400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b2704a9452db01d20dc378c616594f4fb7e468aac578851fab9f7c3ee39036. 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/PTBM12500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfc55920de2a7c9642c09e8b30dcddd97518f5f365ede37d8835efbeaabec9. 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/ES71G2312292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfc55920de2a7c9642c09e8b30dcddd97518f5f365ede37d8835efbeaabec9. 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/ES71G2312292.