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 0x00d596d5552e09105881f74019199ae1e30e837529307865e86dc97f8e06b444. 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/8cf7e0bf-db34-47ef-bf86-df697bc96a35.json and https://artists.proofprofile.net/proofs/artist/8cf7e0bf-db34-47ef-bf86-df697bc96a35.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 0x027a81583012175c7cc9bea972a493335dd3430228a8e3f144371ca768ceaba9. 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/ES5120100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265332b74e28f6bcb9a7ba11309dbebf04f73513e244ae04cbb5042ed6bd426a. 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/ES5120100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe627278d0e04a5950cfb1913adf5134ebd047496a065153ba3507c6409f69081. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES5120100462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7c786d483ae1e21ebe129143a43eb72c214d101a61dba573d377ab7b5abbb6. 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/ES5120100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978c81b0166b05c3440c099d13b2c88b2f69bbcabd9b150139eb63ee22c4580. 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/ES5120100465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899891d7156b867ea56670820edd16ba9fd904ad75c91cb4d950549bb74b7776. 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/ES5120100468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dd6ba7616bed17c77c1b527dddb5e6bea6b7c09af5e674f875ec66d1f92f79. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ES5120100469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353f6d362b722c446f401a9f2cdc65e28c12ea0d2396438ee9bca28b1f9cf3e. 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/ES5120100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1b10afe7e3e3fc8aa91311b77b9fad39afd353ee21dcd9063a89abf2ea0568. 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/ES5120100471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbad9f57cbd33b78129d72402c0e8ac80a4363615e63b3b88d89390ea952df25. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/ES5120300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f57d0d3361a5fe35e5c143671c8a4f88126208e88e17c1d1072e0dc5cd1d92. 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/ES5120300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0326f1d03e350ae5b75eb5bea798fecfe32f45fd13e1f52b0bf17793f53b80c. 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/ES5120700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743b00f711a1a0965654bf40fa8a6626def6b0116d00f36b27024c3e512332d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES5120700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633947c892cc8cdc314e2e4931aaa9a3e58e60a8d8380beb481b075a10c5bf17. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES5120700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9d33a8fbfb1297c5f903618a2b3cf8b511afd25b8feb71dd81b0ad9b2f738. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES5120700181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5087b8644d976f7b7ba64dd1c77ad0d620869390d9032fcff6bc5fbeb7582f80. 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/ES5120700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c0c1815b862663fb302cdbf441a3d330155edb1ceb93ac6d004a4006d9b146. 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/ES5120700183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705d58a8fe0821b66c285064f91b68fff033df58fefe50664460d80651bfb190. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ES5120700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba50a242f1df878d3efd950cc9e33f5cc7b571b589d573ec8748517b114250b2. 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/ES5120700185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc332d4387cfae4104d07734b625e35a8a56e548542bbdae3c50790f7309b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5120700186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7db0df10c95a55beb99f2d4554e7cf7b84c9e9cbf41f298c64f12de1e6d5d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCACX1769778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99e0ff9920e7eb55a2671d406082b9a376ea37155250b131c2ff1f91143e59. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHI2337078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d079e773e4cd2062dbcebb89bb5eac89614d62a54c103260be0d1764b4dff67. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ES26B2502769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d079e773e4cd2062dbcebb89bb5eac89614d62a54c103260be0d1764b4dff67. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/ES26B2502769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e8a758def7fd99800b45d171c9a3cdcb8c01ab7b96044820ec3276460f682. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/ES26B2502770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf2f216ed271f41e9f5f04c917f3cf2db2c4ffbf09fa0e87810fcb9d2e09074. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/ES26B2502772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18f1bc3f10cc8e48aae91fca96c1ae4447cbcf8b3e9e7a259a07884a953197f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2021410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f57d0d3361a5fe35e5c143671c8a4f88126208e88e17c1d1072e0dc5cd1d92. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES5120300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca589f2a50473529a32498e3499bd2ab3487ff3bf573370957693e7a13766d32. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ES5301766138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a299e3c5faeb8353eeda55932989509255f444a174b2eefdf5d2e839864780. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ART031000087.