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 0xe2218fec3d39762a8f8c90af85f6683ef436f424e1cd13301fb72e935fe35806. 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/902bf48e-1357-4786-a078-7a30ff30a244.json and https://artists.proofprofile.net/proofs/artist/902bf48e-1357-4786-a078-7a30ff30a244.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 0x7d9d585d657216e4f900375b5cf13f2ea4cf0323d9ff08edd2255c64327b9b38. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QMQZ31220003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594f8ece22e841b80f2adbeb92c97f1a7f74838856b06ad42a78206199cd579a. 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/QMQZ31220004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0073ebe5b1b518ec23b1e8f85dd93dfef1b4c85d74d99c433a7f818fa5aa4c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMQZ31220005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bea9fe0ae0e5eb5e795cae92ac7a299864f68f7cad6fcd3a3663cd481f5ee0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QMQZ31220006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1aad3bb3176a07e4761fda4ba9a57ade91e9f34f949ec8b1289e48e87e95f8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QMQZ31220007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33499bbb709b8f875cff552ca017b95851ce4daa5912a4f5d4c59b32836936a6. 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/QMQZ31220010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e5f62d490ed59cbdfe4b331abbc52cbe058214da29be638286d8b2060b58a0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMQZ31220000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f43effa6a4e738761fae9488e1fab541eaf77381bba79d15fea7362bc23d0. 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/QMQZ31220011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55731243261052f2e30b39ce8d2da091d2b479428c88e41ee79ca71e2eafea7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJS2575761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cd44dfe7b3339070214583b08401fee0ca67ab8cd5f4cac7a7c5176ac38a9a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJR2575778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da54b2dacf1cb4cb5bab54ee8595cec939867e225c8338e5f57a4bd25d946b. 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/TCAJS2575803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738bb78b3c2a13d1683c3d433b92be4b3554b4f73240519d1fbea84c42d6c2be. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJR2575819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369c8629c405726526f102750b55c465aa87e4d85a97acce4d2a5406a8915cde. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCAJR2575832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15421f5612a57ddc66c37a15a1edca09d19fa64ac123a6597c70a08ac5ef34a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/TCAJS2575840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9569330d5fd22658de99c22b590047e2842caf6b84775943b5e6cf1df40ff076. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJR2575846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c668f2990c8039c4cb0dd84105c525daffaa0028c3e4704864f74bb582317a1. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TCAJR2575895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45de38e99a6ef5d8c07f4b2d38fac2eba91128e8599eb1edd4c81e9cda13870c. 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/TCAJR2575920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa29d3d0b0e9043558ff927baaafac108ad33597e5d826330e0646f8743de786. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJR2575933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755318f1128743989e079caf651c8d194a7b19c38f0abe4ba17adb4c28b7d077. 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/TCAJS2575945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecd3178a317c6ca486ab02ce308463a3e6e4e03744de1d35c773212a9bceca7. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCAJS2576008.
Star Songs: Lullabies for the Whole Family
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38b59d13b960307e5e121c9142730735d8bc2dc04ddd4e3eabb47d8b49aed1d. 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/QM56S2356703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6494a48780f760fb8a775d77e3a48a1600f363d27d7ace7a15de76ba9f226021. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGWX2031472.