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 0x8414e6dd88e79c96a7ef45944632bdb69f010f75dad5ca11ab948d2f523e1f26. 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/f497fabb-df4d-49a2-88a7-9d4b408861a5.json and https://artists.proofprofile.net/proofs/artist/f497fabb-df4d-49a2-88a7-9d4b408861a5.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 0x4ee8210a9b30e5448c48d4aa8cd09c1e666fc5f6202c6a16fe167e2d5abbf5ac. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCABI1202072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90edac2b05eeb14d023a6edb4c3d8cade089319cf8a4dee1e65e68461c282421. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABI1202079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfadfdb41436014b05765f4e023b8bf1340db56b93e61dc78fe42e793186cd8. 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/TCABI1202092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69271be6b1963be0bfb32f4ae3f498353001976177e15e3ef63254155b16cae. 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/TCABI1202093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c04f4e0198bc6f4fba4672feefc8adc9a0b987806f92e7d6dc946565a9b2c4b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCABI1202097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b6ff1c8e83cd6a6641a26bb9dc2bd7c7aa0dfe2bf98f079bd0a40b9d87a62e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCABT1472056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d12803f7ca70d343e49db603d697118230b714f7739618e281e86c2f93eb95. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCABT1472061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0534f6ff98ebc930856beaabdceaaf9cbadd21237bbe50184d5f16f3aea49e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCABT1472063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eb4bc34645548ad60ecc30f5def9d9609b92a85c6dbcf7b4100f117a07c64c. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/QM6N21565336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6afa901b0a4d54199093a7de0e435360c46282ad7df8e5604852d186ebab1. 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/QM6N21565338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546b967898aafe724e00f70af01efd523eb697d57d715522621150512de2274f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QM6N21565340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be36ab7dd2188c4d6f48128c8ef05f6155b9e13e637539071ca696f0d093aa1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM6N21565342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e0580b6cbba7bcf7b27eb4e210815415590fd6ba03993dabc2eebe4fa66e9e. 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/QM6N21565343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ac1b97ff732d52a44ef7eb853c8b0960efbbcd9877b6a19ff3ac3c0aebd69f. 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/QM6N21565345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e08a385039b5c0cd5b07234d733d253db779165287c45a5e8daec2e8b8e45aa. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM6N21565349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927c58697a434ee4b977c37aef133ad775af344e1413b24ae331b2c4261c12ee. 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/TCADB1716931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02875d8000a3849b4adc2a394299499aeee50501584c216382deb1ec4a858ea. 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/TCADB1716938.
Um Grog (feat. Loreta, Blacka & Dj Samuka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd51dea30e8af8fe88e333162e407d2e7774123cc8a9d30d62e6b4dbf9dd354. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCADT1878744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdada0894ca7a1b29e961097505ec97d9ee3c3f1751445da6b45cb32f439fd864. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAEC1981993.