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 0xa9e2cf47642623b42b41e12f26d014b1716b27142952d96b60c32b055ce0cf0b. 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/cf85511d-3cb7-4bc5-a551-fb62bccce3cc.json and https://artists.proofprofile.net/proofs/artist/cf85511d-3cb7-4bc5-a551-fb62bccce3cc.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 0x5959f29bf11062e22d3fccc1265e3a4d1bb56be65699c60f815dbeb66bfe7665. 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/HUA6V1800165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252e1e7c5e025f64ca9d245e32eef55cb82b69a1693ce0630e607ba1e8f542ce. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:58Z), 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/HUA6V1800167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36884e81dfedf82b46451c9f7432afee4a0922c648e126056e27a890dbec8e49. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HUA6V1800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efb82c7d247af7ddf4546155dbaab520be89612496ca057fa23ffc17ae60ee4. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/HUA6V1800164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b33e2de5f0a044361c34988facc0f5eacc65acc146936465d52102d9292da. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/HUA6V1800258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc24956f699012716e33c174891a67a32193d4b05e77e2f9f01717d8bd232f6f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:20:53Z), 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/HUA6V1800261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc7470a121d2703674709e0236f3056b14f9b2ec14ada22be5f432a1da77a5. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HUA6V1800262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7537a1d224c7c263478ef6efec43bb639580e19db740a39a7eb254b0c99c110. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/HUA6V1800264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e508c466315d4a09d5412d35f9450069ea9b2e24d5c716d98211e7449fdbb6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HUA6V1800265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ba1765350308da4f1ae28a1655ae9b9d211f3ab7a570bc9a557ab672e0ab75. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:14Z), 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/HUA6V1900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2039d5c00e937ec29ab59d0449fba30828ace4b445c4be9c34a9348a77cb6d35. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/HUA6V2000425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a7ebfd21e0575bbb83eff31571626abe557ba1906d286ca7b5904318d337e7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:04Z), 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/HUA6V2000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c081923f6bbc96f353290c99981c7f144cfd9c5ac621831b8117e9931d06e0b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:39Z), 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/HUA6V2000421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf91b6eb5cf98d1637ff004a5d26aee66755611f595469315cbc002f00c9620. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HUA6V2100501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6d468e633d2b152330f533e7acc82ae490e3d77aa1800d3f1e037f34e0af4b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/HUA6V2100503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c5155cd44283f94feecd5d9f5019fab2650110b2be1eec01f8aeb4a7c8b83. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/HUA6V2100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92129ccb2c1802564b6a28b33cf00d3d3d594c04e21137f932b74fddf37b6f2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HUA6V2200542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245a50b15bc4506df18167d1b673be606b7f41ed2e6ecfa823999403affc6c9b. 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/HUA6V2000431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9089f27f33ef75d73ec13f5ac732185776c684949d0ab8c71a30567aa04c0b0f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HUA6V2300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c642b209d52687547332111e58bfc1e6523b1678c25d0e06af6752dde0020d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HUA6V2300578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0764f432a3e638e56c956b514e9151ba2fddc1dcf8c989ae2a34e7b0e97cd10. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/HUA6V2500644.