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 0x4a497af9197299d61eba459e1c9556693ff0baf619ad6c833f51f10766c66a2d. 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/5a12d184-3470-4c00-bb27-a041263fe61d.json and https://artists.proofprofile.net/proofs/artist/5a12d184-3470-4c00-bb27-a041263fe61d.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 0xfa3902c8d10a09e405fc83f6d6c4bea3b65cae4a62df0980be3eb26a20499b72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACW1790888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc13ba73139115df1eba33231e6c0f0fe93fdb88414e196dcfe1986293e15db. 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/TCADN1848287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4869c2887ffaadf968e67edc3ce477fab6aed059d76a2a756dcf826c1e256905. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:05:00Z), 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/TCAEE1926298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e045082badebbe79d1dcc51558cf6ad278dd2aeb1d63a263cbdb63753203720. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/TCADW1887975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc47820ecaaa43844f8cdcd30a77ad90be72228cd5ba57454422c287f8dee13. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:47Z), 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/TCAEK1905061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13ce22ac891a551887d2c239fa7182aff75b0c107637b42c94ffcb49df0fc82. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAEO1998025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89539a58c7c5ca734e6d9717e4d2bc81667f893e03a66fcd741d6d832b8a104. 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/US6YC2002875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d675c44ad7410e28396f0fb7afcdfe1e122f58e63fba6004565bc6b73b939d1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:22:18Z), 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/US6YC2003014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564a7c0c44036c23432cae15baee1645edbc14177d1b81867d928b422fb5954f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/US6YC2103179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87cd69cf80f8c99c1273a9a2e74ccfa865023b4394dbf88970e2242acd83772. 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/US6YC2203405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8975bfe67298dfa3a3dc8c1b453e5e99dd2054ced6026942dc9e225cc224bfbe. 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/US6YC2203406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c957e2c027b47a3c89a0dfdcd5d56349b01542a10a6d91971c69ec6a8ff59f. 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/US6YC2304774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a768f247e0fa64659bd5da3066b275d51a3334f709d5daab49e019d6776461. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US6YC2304779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836d45393cffe8f2885efe05dbff312e0208cb9aecc26d114baae2e9e8ef62c2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US6YC2304781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e1c98472cb2a6136314727c3cfbfe51982fd5660a3cf0199df3bc3d8ea5ebf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US6YC2305140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b33780f52393614271dc3b28df0c5476039fb8bdea37a0d4aceca84ce066117. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZQAY2414814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401e5d6b3a428eb6753c787e2de0446c91f1e4f9ff76e1c48b09860bc12f47ac. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZS7J2461057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19faf5efd6ee7f82c0704128f916eaedbd2e887a2e6cc39b58e9f4d6137c2bfa. 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/QZS7J2433235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0c3f6a6d361b1ef36ff363f41bd63b493f18568d27d12fc63b729fe6bafbf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTLA2559972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a942af3774f6029de3a52966d97c83eb89d80b2a4c791befcde2029591eee6f. 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/QZQAY2508690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0973b52e60abe3e2d64723811dd762e8fae2d5e53408600c22f07e8fe87e2b7. 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/QMUDT1200099.