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 0x375fbdb70347771f2c742369be71abe2bf02e5511a5ee3d3e1c62f545606924b. 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/65ce0e24-ab7f-43fb-885e-06331ead4a90.json and https://artists.proofprofile.net/proofs/artist/65ce0e24-ab7f-43fb-885e-06331ead4a90.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 0xce4516cd2f545a95fef588de3d33b1ed6f4e2fd7e4f3c4a896b1116699de33a8. 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/ES11D2200811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba503b6b218ed40553115c544ada6c6a47b5bad89d8a5696580e859be687a1e. 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/ES11D2200813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639a0e38ededb58d2c9028723fbc6dfa2e40602d1a765c885167d9af514bd82a. 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/ES11D2200814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc900a4c1d9b7f865d7c403604fbc8f40f33666ded9d1fbb1526f6d0a269aa02. 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/ES11D2200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bef1e23d5bce7b9b17d212b29ce9327297d1d2fd0653547092fe57107f6b36. 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/ES11D2200810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386db092c9b73bb5a7f3c95f808fbdfa131fe9a8ee9b872b64ef427f96b2aa24. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES11D2200816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da390a1f7cb98dce9fd6c4e81d77439d41ce01fcb7d5b0fc3df63a765101e68. 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/ES11D2200818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db29873ce9aee95ddcd4882b147b9866a1a0baad1efb144057bdb69af25a310. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:06:35Z), 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/ES11D2200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd33b658a39b071e60aa39ca6f92d3ac366a9470027842a6e8a46caf69a1c33d. 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/ES11D2300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8972f7f70232b36e172b4f5f500bfeee221720ad59a9194ffdba383eb131b242. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ES11D2300993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2a6ff696b81deaf448f3f86ed4ff65c8a1350d996878fb0a6921666a282191. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2a6ff696b81deaf448f3f86ed4ff65c8a1350d996878fb0a6921666a282191. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ES71G2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca554dfb5e9b37f1bfbc13971dd3fdbcb33dc18f5bab1e4161599eb9bb3ec27b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES71G2503501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4317052d897adbcc34546c7d3dd207d7746dd8ff5c656aedde2b8b258180eca6. 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/ES71G2503502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e079fced97a578afd093d99bf290a21d7389c163e11e19f30da109ddec5ed59. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G2503504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0005923aa50b22f075359ae74b3f2db82ca44f9b8a9095d87fa43eb1b105fb35. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ES71G2503505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f5bcd71d1bd99ab2654adac9f45ff74d54cc51ad81db597aa49ee76f9a3b3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES71G2501641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a43656a283af51e6c95e7b76d51ae8b46af784a078b9cda991cefe9e34946e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES71G2503508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561b7cf5c750a2947aab570b7f9658fc0e1fa949e11b71555c3e7314d20056bd. 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/ES80A1506302.
Cantará la historia - Canción colectiva por Palestina
Cantará la historia (Canción colectiva por Palestina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498c53f93848719f0205514ccfbdba81f35e319249375b8e8c1dcd7da52ad8e. 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/QM6P42444799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f827cfe2d023fabe56f172b6cf62de396b709a874de27e29cc550f850ff2cbd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES17D2402632.