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 0x85d3dd1440fd27258302e963bc3f1462d58950294a0935c0651405b79fe244a1. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1ad3363-3575-4d74-8067-554b4d7eb1f7.json and https://artists.proofprofile.net/proofs/artist/d1ad3363-3575-4d74-8067-554b4d7eb1f7.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 0x43fac9316ee11d56f08a22b8403921400310c23090ac0cf462f44a99939ef21a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFJ2370399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd57f9cb166820058c32d3f989983e8569af03d232b16ae89aab3d0d41a1abff. 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/QZWFJ2370403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd159b4007dc1d8fef7bc74851f5dc676ef3469e690a683468de31264c3029a9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFM2340571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406a9fc4fc5ddc1adb2a3efbd0b56f5d433c142063c7d2a15cc3d755cdd93570. 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/QZWFM2340572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bf6e5f5dc1b0679cefcb79e8d3a925c50f586ebdf0e1fd6a445c61b7f66dcb. 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/QZWFM2340573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2fd8ff7399529264fd241c340cf9f27636f66ed62ef96ed7e4727da47e672. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFM2340574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673039f3c739476f9c8123bff9c5b67445bad52e37162273774129a0da328c30. 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/QZWFM2340575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e612f0b4a1fd302d2347c3e0a232612c67b3bb2110d00bacd16ff57aeb8c6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFM2340576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb379cc65adca73d03cfdbf960e5f4ed065227c0e21543aaea29eba643250eb6. 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/QZWFM2340577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4596f448fe952c9e293efecdcb031abff1d349a89df15561b446f9b2322e8cb7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFM2340578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1ffccb0fbc588a0956854aea2fd8e0ff04f16a645bfb08304049078bd03db4. 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/QZWFM2340579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeb5c212d2e8a02814ff3387e5c8fe95826cad60f74808245cba20a9c94345a. 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/QZWFM2340580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dc3b01b0400f53a8fa139bf47595808fd76520c032ab374c79d07bcd2f1bba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFM2340581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e072f692f0c499cd5abc3139cbd7b1942ee20c551fa11acc78cc581fc4e9f2a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFM2340582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c2143fc520e4026fb8748260cd0a5f6c6f9e30ba110788dcd0989fc75d6e5d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFM2340583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd350d70355f157d8e60fd0525d95acd4360f03512d4ef577e818481448d86d. 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/QZWFM2340584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc670b010e6ad5408dcc7e1aa21050b65d6aa94349430e491b7db40804ec7cd13. 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/QZWFJ2370401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce72c6cd741e844132705b43c45f678987945c8dd771ceeca40a4c90f9ca9af. 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/QZWFK2340404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1679f87f2d206fc04fae9fd8bce43d501712f05868b8e2eeac7ce4409d2f1a73. 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/QZWFJ2370396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efb4b6053ec6debdcfb8f9d900dab82d62fc7033db9baccfbdd4a195f391f24. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFJ2370405.