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 0xaf07df902bba628a077b05bcf4670fc636a9afe607cab4439c2b1b031d16ad66. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1334106b-db2a-406a-994a-55bbbdf28f4b.json and https://artists.proofprofile.net/proofs/artist/1334106b-db2a-406a-994a-55bbbdf28f4b.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 0x3581a1c8a26a96ec80e9da314d7b0fedf174a85290a400efd2b498c375d64540. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEA1832994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7999f603cd3a90dd0601f5493b628d62ad209f7f4473cc8a7fc058a4e74b54d9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEA1832998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b13d5b5f140d142f9341e8e4a07e55b735b7e416e0484a4d83a4ce233047a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEA1833001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c034a276b0260a707c3b131a578af774867054aafa45b30bf38649541ad933. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/TCAEA1833005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f65ff06b8ab208f3d677548b6d6cfce4c6ebde4e9c6b4ead9b38e00e25230. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEA1833009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216acb756cb0a3d6db4a91632fd44afc3f3616c7c76bc8de049d370b21ac5bc9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEA1833015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dda0a75ebfe465c65ef37e7ca79af3543a44754293bc6a6ca727be2c33db7d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADW1840377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852b5cd740313d10bcf1dbc23bad9f0a47dc3b6e3bc88fa72d5e4ba919761e92. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCADW1840405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5263342ad18dd134f4115437c747f05346de48f16ef3c9e246af992487d626. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6L2361324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc54cca58624fed1177e5feb6e8e2de00e52e3e2418d888570e48dcf75e4731. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:25:06Z), 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/QZTB62387093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04434564e5f3afc5d493c31682e8ec7201241ffdbd75c458faaca22d75c2b96a. 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/QZTB62387094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc265680faeedae08b8a91cd557511546ea63383d3dfe75995b7a82366e6a3f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB62387097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92534539dea4a6986c611d4f5b8f148b35396f53e4fe7ae4308e6405db70f6b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62387100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf95977afb198ed6dbe0c10de2efec9f4b99ccad6c1b4feac5700539ba301c68. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB62387101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f306010cb5dfcb2609452193e20f7ce6ad4577d572586aed38fef784c0d8c7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:34:02Z), 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/QZTB62387104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d9d548a454c13437edb0b95d531b239693544038b57db4ec150ec80d1e874e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB62387106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dec16314757d90e298eddb27b25601aca09b08202813165b3eb7012284f8fe. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB62387107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c6b4192c0ad6cde91a5098db34a5ffff13eb61877e18ff840233340305ec28. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB62387109.