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 0xf7d87aa2aa006ebf10178fd0ad1c77aa89bcfac4e82f3c553056fb13c8faedd9. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25ba68aa-2f59-4d83-b8fc-761fcf9145ef.json and https://artists.proofprofile.net/proofs/artist/25ba68aa-2f59-4d83-b8fc-761fcf9145ef.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 0x58b9bfd135725fc36be0a9b66740dff2fa1ba740a21eb50df05380756c064105. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/CH2012221142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab054de8a53b1b64fb8c481ec7ca1dca0326ee2e0b67b3d00f6f1249051bed2. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CH2012221149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f1db72a274dce9269646acdf972077c33b6315676a849a23aece63a79797c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH2012221150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ca60ba745406549564a387df42e6748f7c7dae70fe87a818dc40ff008b4b2b. 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/CH2012221139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0991d42fad0c18f64232a9f9a6174b83a0b7b548624a1536ce1691be4cd3f8e. 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/CH2012221156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a16bee81b9b365bac9d2150b174a98dea5f9a1a95304a81e7b19ce85904226. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CH2012221141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a58c46809ab6385c1be6577a827327c7b9514efbbd6bc4e6d76c91e20800c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH2012221145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a879df829c354e1e876d4fe26d07e040e284c315e43059434cbb7610c33a05. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/CH2012221153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b4a3179743ab7755690316efb998558c09f2fbf4a18419af9336fe25af007. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH2012221154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dfa7a9b7b7f60d471a598df324b97d60756e69f90c30471a12ed12cc3953a1. 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/CH2012221147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65197cd1fc95bf038479cd7f13bf9b602e5c09ffc0b671584c74b41b7dce8bdd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH2012221151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1af244c38d37e22ba5e9d9c047903fb1ecf4a0ee583107c09c9a0d396046a0. 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/CH2012221148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dbc350460dd3aaebb7689fe15ec8bf3e3db0dc2ee59bf4c680886400406b05. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH2012221144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae47045f8400ba46bfb69256afc7df0b88efa528f8ae3532be0496dd0a266730. 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/CH2012221146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dc12e5ab429a7ee1659dc0aa91f2f5e68d157bcde67d5d4fa75a00aab8764a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CH2012221157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fcfbd89774c806a202226898ffb5169474a76efe2147c83a23b35cb5c94d3a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH2012221143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa9d65a0583fe833de555b1197ea0a3b42e9786e98a5eb41ba7fbe286eff9f. 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/CH2012221152.