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 0x8cf757f0b76ec22ccffa46530f9f3d7d857727c0bee5d8a331e9a2322d21e37d. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8151d2df-c76d-457e-88c4-a6b74c52998d.json and https://artists.proofprofile.net/proofs/artist/8151d2df-c76d-457e-88c4-a6b74c52998d.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 0x7a1ddf30aa311b2b6ba759157ee54c0e65e60e000283ac7a5da828fd75530c91. 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/QZMER2318089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f67316de44b29e5fb54e97fd040b5873a4b6a6e9a671fcaf6d0516133962aea. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMER2318091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0019f7c1eff3532c127f01c4daabce9565bd42a5eb1e57776f8dd64d172e2b93. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6J2320665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7882eb1013c477bc01f407d837dbe408c284d68aeb71ef7484699d6bbc92fd2c. 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/QZMER2318093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9add30300cdf1a94f6b2730b855e1961c00443400a6282d026ef458dce555fc4. 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/QZDA41996551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123b74cb33ff761f189f88655bad664bf5a24a3f99902b4aa17f29217f0c631. 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/QZDA41996552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd505fc00319184f8b048838e6a3497a08b8b69ef612fe47f148c4efaf2b8d3. 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/QZDA41996553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe388340da590bf8d53e743e82fce45233a6cd6d6da0619fff9e79c97d2203379. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA41996555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d959ea4c30ecad830edf672a36638040fe0bfada7f29f331e26a50b1d4283ae. 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/QM2PV1692812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408bfeae872b185058f4c36699ecd6632cd991be3cf3225f8d4503ba42099943. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM2PV1692813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8487e79b809a640e89c9e892dc6ce0048199383a2ed4e915b2e9dbbc5e506e5. 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/QM2PV1692814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a986e6cb581d948dd8769ac9a08fc7685cafa2987637b270e1604eef5caa22d. 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/QM2PV1692815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d8f3a59b2f0c14006b1d47e32175e373cbe8e3905cffc1e4d22a55b6fda39f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM2PV1692816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb99a74aea7e82bb278264886ed1f72057729e5dd56bbb90608510a0be074ce. 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/QM2PV1692818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c819b47ef560a15d96f12a7db9a63f67d24840bc505339a9f5f163bb87f7d7. 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/QM2PV1692819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0019f7c1eff3532c127f01c4daabce9565bd42a5eb1e57776f8dd64d172e2b93. 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/QZK6J2320665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062ac9e4daadb9df5e7aa809cba0bbaf342d515262119cc5a67857a71cb0f7d8. 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/QZHNC2300815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2578d80ee93016e820325559e6577015132d0bd11d3e8df4cd0811601161ce8. 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/QZ9JZ1702018.