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 0xc259effb66f4158357535e1199ff0f841bc2c091c92ab5a800b5689c87921e58. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c2a9967-90b4-4208-a4cf-2ebb1c999fc3.json and https://artists.proofprofile.net/proofs/artist/3c2a9967-90b4-4208-a4cf-2ebb1c999fc3.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 0xf77363fe896722536e8fc71e34b79b1e67c39163e46acee619425352996ee129. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCADO1869722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1121b366110efcb2c8250e129e7e320e2394a60f86ce64e8a2ea72324ae3cae. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAEK1944410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc62cfe94fbc10cd972dbfd76dc4cbd0c225d9740642531781d39c9aa746d166. 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/TCAEW2008783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f751dd81fe4dd8cdbf4ed5ec839850e130b625e3b63f8053216bd96b4884228. 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/TCAEW2085141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccdeed6b304ab8dd49c74592ef535c2436eac23c7fd177979b1b58992c6208c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGH2226326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c7e76bc7d3536f785bf99febf7ed23b8a3b04bd4f4ff087dcaf4ded530b169. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAGH2226338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b53f1388e8ef56ad80022ba2f26a5ab12751024d2848d87e772d9c0a84c4a4. 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/TCAHP2333927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d7c81360f7f66fdc867abc68bee906a52f3772e492c31f727646d364278a9f. 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/TCAIL2441747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb24f2ad7e0540d71ea4f8ad4898271fef305ac5ba79f8be66ee3e6739e73c40. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:38Z), 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/TCAIL2441756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cfb9449c461a137d83215e3e7895aec19cb894785dbd9f92fd388bee62cc32. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QT3EY2435674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bd4d20457975580cefabe712324bb78ddc2bcc751120f65ffce2dd23c823e0. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QT3EY2435675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8131a06188cdfc29c5435a1014f871e560a798cdd6138c364c4dcb5d883327. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:50Z), 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/QT3EY2435676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789c0c93d404dae73efb8ce11b2e30bb828e5d4165c5ba034cd73807ffe5ebf7. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QT3EY2435678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2c18d0be85623207652af6924e6f0d067180dcdcff6fa9f57db09697b2d153. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3EY2435679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef50679b006ecbb44a4a03e3e4a2f487db364ba77ed73a03b2db45496876528. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QT3EY2435680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc126c5d39666f213f81182ce851a2a399ff5a046a93f99c0daa4447c26f131f1. 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/QT3EY2435681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0c4c0265f23d871732c2c0b67b4e6c1bc2536b2cdefbd48bed73fe778a742f. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:20:00Z), 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/QT3EY2435686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06670d73d6bfc48fccbb3948db543961967bc3ee15f0365fe5009288949109f. 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/QT3EY2435687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb146dae1511f0268f3aadc088d7c6d14531fd6be94e948cef37bb39262056205. 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/QT3EY2435688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e3817a810cac1a59030e4af9b1ef1206eb8233143770a910d6a056a3ef7535. 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/QT3EY2435692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd368fa620ada5f48c2170cd2a7a0342d73a653fd32642c8f7042c4e3ba46b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:49Z), 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/TCAJN2588341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09813334887fae5eed5a99a0b83d6dcb3590ca14a911fd19ded7b399f8fbb1fc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJY2514325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc1d1745ceec477abd7101e977803bd58a28f7954bfeefec620bc59bda7f628. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJY2585273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc227ef8282b502a63f5954894fa6f6fbe8061fdc93657b46272b5be19234da82. 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/USSM12102195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a6ac3903efec95c7d02bb849cc5f57f83a4e6dbe6d93cadbbb4854e655111. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM24S1927272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f2d56cac4ff27fec9d6a470b011ef4214ade10eef0c3830485b9f528165ece. 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/QZHN32033031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09ecad75b6d8628df30271acf2c808c451278469b6f0d80d57c89cb7a0eef30. 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/CA5KR1954442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f272e843e3b53d96883b15752cfbccbe2ab540334b8abfed1357eb121567a15. 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/CA5KR1954444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bd094af6817d17c815672473f615926200a4a3a52df67a488bf0a407b1ccff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR1954446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b8a6f11c07cab8ecde3b9372770b8264d8cbaf38636f438ed253bade58123f. 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/QZDA52260349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2566b05fea16c887ec34bb0c31f55ec16b5e1dfdfc08932a35162f94a88bafb5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR1954439.
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 0x9b53a1e4c897492412ec2333659b730003b767bfa046095a5b98300fab3284c8. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CA5KR1954440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2600dc5b92e1b508b2fcd7972f0be7cf96193e582711db4ccffe9c7baedbea66. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CA5KR1954441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4934e4c674ec74f6bb08a4a49f8072cd4d114104021995f78ef6198dc66ec96. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CA5KR1954445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fc1ce5ef9269d31fe9deb63d7544a3e91399de71b3ebdc546346d571bdf103. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR1954447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c8a1160c5359d355ea07974c4393e1619754d779e98cc1e1e0b44341ad91fb. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CA5KR1954448.