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 0x17d9e7a966b1e8eb39501376f37c7a798e7d4ab9088ac7cd7023cce97c04b274. 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/61d67640-767f-41c5-9154-bcf4c4141e97.json and https://artists.proofprofile.net/proofs/artist/61d67640-767f-41c5-9154-bcf4c4141e97.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 0x28eb3b5d5b8eed9d7c64d740bb0754d857507702e5da69236ef5881dc10e6094. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAID2445781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e85a04f970048eac2904163fce1a6d668790d3390cdbd6eb416b413d08b186. 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/QZZ8A2398123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f147d5fe9f85de29678cca140e891000211a76593c223762c1db9ef6c40cf4a. 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/QZGLM2394757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a1da27aa79377784e2e975f71d32cd7fa5d360f9bb5d7b2f88aec28f7fbec6. 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/QZGLS2302392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a3502e2a17f46527bde5471177e3facf0cbc3ca181552b710d663181521cb. 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/QZGLS2302393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746918dcfdfef56a08cff2a1758931061ac6c285242804e9fca4dff4b2b17dbd. 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/QZGLS2302394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8561ce902e8879e2ebe329db808af55fb2b3647cd9d30a8c386b0550624945. 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/QZGLS2302395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9b2bb526a6167763dc543ec19a0af0fcc6f97d7ddb3cfd0146cad6c22df2ac. 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/QZGLS2302396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f147d5fe9f85de29678cca140e891000211a76593c223762c1db9ef6c40cf4a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLM2394757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08448ade32f828fe6461da9ebdc302874c1ff6f07d973da76365f811ac58df51. 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/QZW9M2234084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e5d48382fd3ba738366166e899f2eae16fe9d0cd00e844092a5eac2b6acdb4. 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/QZW9M2234095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd42310d534b3f408dde65798e5c5b5f6d48b7e70b9234fa48dfa2b4af396cc. 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/QZW9M2234082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0032dd6a03986c3a7711887ab94706c0b36e402ae432c743e0f752f2e8288f. 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/QZHZ32288808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b07724cce69bc63dd234a1f8ce95d05f7c5ae0268bd49470aa6aedba84ec08. 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/QZMEQ2117055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4291f38413dec628077e6c876dff1b5f7c1318542dd49bdf09b363ea46cc257c. 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/QZHN42103524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500298e525027875c2edb48e9f2e0aef1023fea5493fd074f5d2fef46b260b6. 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/QZFZ32199489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243134e422d93b6c8d6c99b4a1bafbe39f2f829803c91969c53c571f6f0e6acd. 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/QZHN82077485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c8d2bec5e7b189933be73b57e362676b879c5ad19d5d48f7e82060296b95e3. 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/QZDA82282620.