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 0xdecc91d0f344c5b7c4d15d4ed24651afdefe8cda6dedcd72831ae44c20d379a2. 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/d2ec59de-77aa-4185-8c54-3e734d36bded.json and https://artists.proofprofile.net/proofs/artist/d2ec59de-77aa-4185-8c54-3e734d36bded.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 0x91537d922822d0e462b24dacdb434bfba7b3fb1c2d29ba9fd3d70defc14b33ec. 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/SKA012300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4cc5ed6d0f1894155278aa6d4ce319a3fdb66634fb6aeb23f1bdee3d6d67b3. 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/CZUM72200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112300443c5d8ed02c9bde658f5d8a3a60cd18a45c09a4e42306c8d6b9c8ab70. 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/CZUM72200524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29478dab29c914e5479ce605fb0fdc4a2fa10a2eb8b29e6afbaabd8bbf89f751. 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/CZUM72200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c7743b41de1b0f893c4576a8e2a92612989c1eb2c32c096e5fcf82eb5f069. 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/CZUM72200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894686b184190e4db17e54baceea921911d420ef4077aaa25f1cd33e3b5fbc44. 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/CZUM72200609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c360540be6ac3d7d2ac2c89109b334b008085e6067f5d3916c9c12e0c86a014. 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/CZUM72200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81adaee02d3ad205d094ed1914fe89ca1f1afc4dd8da6d2d580b47c1f53f00a3. 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/CZUM72200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0313549fae5035acab47727cbc8ff2549bcf0699d9c7f0115176ec6f9684ae22. 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/CZUM72200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7714dc8d2d38f60120c97d4207a4d842f08f36e8ff413e7b16922345e304e2e1. 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/CZUM72200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ef8500f2f30fb0e3aaa1f28da36240d579d0a9dc5f616326988a111676226a. 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/CZUM72200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142e2284c36e509304356227177627650f7347eb2e5d2386713bf9ff7b0c07bc. 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/CZUM72200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157eaba5a7badf58d39ffd036be469cbc536f585a47532b21596936bb9dae60a. 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/CZUM72200615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91537d922822d0e462b24dacdb434bfba7b3fb1c2d29ba9fd3d70defc14b33ec. 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/SKA012300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e58d6b1413ed85c0924cd8060ad4db542fe62096583de80e2c4b8f27e597ac8. 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/CZUM71900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1593b5be55459aad9a69d93629add60e218a8e1fce0a5c55daf9863396f62b7e. 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/SKA012300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f2434eb8220d1b94cb913b49b19b70d970cb4170249965f10d849cd5ecda3d. 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/CZUM72200816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2d4b161acca4a451dcb7dcf2f12d0d5ef42c448636079f7fb58b7eac6fc842. 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/CZUM71900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec3a31a1a9df4014340d292a1444f6559a82c4b7c7622532d959979b847a576. 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/CZUM72400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636accafd353a556aa1f83985a937de4790e75ac9622adad980b7627d1bc7944. 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/CZUM72100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b300c228ddd3209606abd36b7880fa02c102b62f053dacac02677e86cd0dabb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CZUM71900246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99695121b78dd5a2ef1d5e69e659ba1222a378aa4c2574c9b0d14e25b710a2a7. 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/CZUM72301375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a355c4e6e430999c0dd182f3cd1c59979e1014739d7f4b32b9b8143bce5f661. 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/CZUM72300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc12e0d03d22857c5de8cd68133d48d28ec70a2788814a7974ffb51e9b3883ff. 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/CZUM72100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bbbbbe4b3bb20f2c74bcbb2e2e4ca7d9ee1ac41d584a659127603dd4057e22. 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/CZA232200634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610cdba6d9516b69cfef3f27b7a287209ff0c3f7d807b9ca44a81faff4783975. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SKA012300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc002dd7af9ee9c53c103050a4f96a5063df05fad81d484f78ae103fa07a1dbcb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SKA012300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dcb93993fc8b267fbd9bc251bc60b46c42381921b119a00166fe68918bd0c7. 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/CZA232301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb9c1dc6ef35716a9774d5ef16a1ba878b515f6646b325959c6c9dfd2473ddb. 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/CZA232400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92856ebd8111fa8dd56715d2dc46e3bf6ddbfc68633a90be9860bb393f936746. 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/SKA012200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc386718295c49b61afc455d0ee70dd973fc42e2f4d6f4f75bf37b2f5e7e6e6b1. 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/SKA012200349.