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 0xc727ced5ac0700ce73aa61951854d7120d01ab4ffd1abdc4e0601baddeaf276d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d8dc0d5-c1b2-4caf-b872-99b669d80d4e.json and https://artists.proofprofile.net/proofs/artist/3d8dc0d5-c1b2-4caf-b872-99b669d80d4e.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 0xf652e0b9e321f20dd15d8068001dee2c57b21a94e6bdd78f7f02f02e7c261729. 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/ESA092400764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d61707c4b0de17669b33b9afd48d1aaa6ec5229b1289293130cc0320af3f45a. 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/ESA092403687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0426a6437831ba7a72eb6fd939febceb4d4b92669b31fe1de568b1d50c709dda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA011800822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd681130aade44dee2e1386966ca9d18a228a815618210b60ecbda33250ca8b8. 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/ESA011800824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70028a828906847116fe195982afa1db66743fdc9cc12b8584870b3fbba8b32e. 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/ESA011800828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d61707c4b0de17669b33b9afd48d1aaa6ec5229b1289293130cc0320af3f45a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ESA092403687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf652e0b9e321f20dd15d8068001dee2c57b21a94e6bdd78f7f02f02e7c261729. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ESA092400764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cab9e44bc8984b32def8bd78649134e99f500ada5ae9d0debdeda5225c0b94. 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/ES7712005301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3e3550193727f74adf893537c7c2d76c14c546ee9cce572ec6c43b337f2d49. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES7712005304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ff499434653b480820f34b6804b2b404fd44a09d5052b1ea8dfbf354b3989. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES7712005306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d72aeb3f8638ee993621c6fd5b7019baf1361aa72df2ee2ebdd5ed68513333. 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/ES7712005307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee4498514a485454e24d705ee632694376496c12fab1d05d48ea914ffa0f7a8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7712005308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ecf292615873c5e957fe2bc851e81f1d0b945c747f706819aea2a7087a5321. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7712005309.
Día Internacional dels Drets Humans: 10 Desembre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf4f00384794f5f5b241549428f363fd587b97a657746c1444acf2748cb14fb. 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/BXZ9P2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d61707c4b0de17669b33b9afd48d1aaa6ec5229b1289293130cc0320af3f45a. 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/ESA092403687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11b5714f6bfbb51feb666fbfc1eb1e18e18c32ee27e3ab84b256d1cfa7ceaf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA011401927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582c208317fe856d0f3b0227faa096c187c434f91e0b448c455b22692c344558. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6QR2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b26839a640c705fada4d5519a8852b42e9ce9985accc4fe11ac0be3ddfc502. 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/US6QR2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1040cca703764b0137b2526c29eb52170e1d4c39e554a96ddd49f44cc85d0ce. 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/US6QR2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba57dfe56f2f8b51c1427e7b30a185e3bc9cb558a471238e521d8758849125af. 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/US6QR2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154eb07ce8baaedf010966b133bc11ef593375ff0b0a02d18b6d95bdd2154002. 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/US6QR2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57433dbed66b412ab8834d2b1a2f3ee2eff19c0c7dc150062b764125c1bb46cc. 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/US6QR2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68917785ee9c106f41150db2f60e0432856c62857f6931ef942c7388fbde3694. 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/US6QR2400114.