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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea541e15d4aeb2a158c317b6a814f2a0879f209b2c7284292c3751cab62c9b34. 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/fb205760-211e-4594-84fd-4ff8baddd30c.json and https://artists.proofprofile.net/proofs/artist/fb205760-211e-4594-84fd-4ff8baddd30c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5695da04701efbd5e0116340c5ea063b320a287c1c43673af323e28ea85fbe. 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/KSA012150974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1f0edd488f4178e42a9e9b8451b0fce0663fd6ab5bf49b9ad9f6ecd42ae3b4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/KSA012150975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc0170a81895889390feb6150d47d8732b9272fed806d67f5ed633d0b12aee7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/KSA012161660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2caff91ac02e35d0049a0bb756cda66bc0373f33504b179c78a3693cac01f22. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/KSA012178109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddec20955610ae55b81262333b1f27018299709d347439d775cbad9df72a537. 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/KSA012182809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6fbcd16272c29d442bad6666acfa1372ec39537b8018a1f9338ab0f3f7b2bb. 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/KSA012214989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609882980fb884e1eeff2f21b1cf3149808a1cd1705dcf337348f055fd31d7c5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KSA012233489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c361588899c8595502d2d2dd5aa735f45952354fc96e2be9917554e80111fb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/KSA012251071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe586f69dcd56653654cad43dd804bec0b93e7372e9919ff3e96e8a7f5eaa2c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/KSA012251076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddd2d4060cd63cb2a0299abaf1abc61e0863c73ebde597acf9d6645bd79fe3c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/KSA012251073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e66081c6b0d009d4be02286655eaf99f8f3b60c3b6c208c9b15cd64157f1e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/KSA012251074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5731c57d0a34d81700ebfa933312b56ca4ba47388b06d2967b82efcadb1e9c9. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/KSA012261958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779bcb61272c2eb51bce4f4e6f91433f7cfa2fc9db5295cb2a18e5c2e6e1f80. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/KSA012261960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3971058fc4be7806656472ccfcc35872380263143ac54b403bbe7629477acce1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/KSA012283328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cb08718ebca72685783e18262a41b9851b2768db7835c6fd56ed7629127151. 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/KRB472400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f3587c781dac45b52ded86f473c8b5a79294457ba9c8a5aac6cc2846eccab. 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/KRB472400760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfe2f1834820c92ab3d3531ce45fcb892ec6d7268c8dd65b2b96cb03dbfdadf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/KRB472400761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395526748d428cb35f03477012d45a509a0d7236722c7c688a8e6c9f4f7b4474. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/KRB472401240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ad9775f25dd7f1002b6d1495b0505d229a95708cb8b15f01f75afcf5845a5. 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/KRB472401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff6b5eeb7b7b83a35f4c5f5b07798b7a83b05622295f0a4e5c13d05b827141. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/KRB472401245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac0fbdea58fb0003aa7b75ea711e597f6fb6be3239f0ac3d26004fb87f632d0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/KRB472401246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb10c861ef91e9174b2bc9a52639b614400eef790d3a3d2e37d559128b61dc3a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/KRB472401248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1605e9247399a73f99a0567c1bc77a6780e6a89f12f5dfd7e363ddb001158f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/KRB472401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b46e30223b80fa3080e7b6e8655f7b2e9d88b3147c2d1cab4bac6e8bf52606. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/KRB472403600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288bbc66b9eb29408f4d3505f869f5731b53121001726f316c9eb88b466bdb33. 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/KRB472500820.