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 0xf6297072bf901f5df1cb3a097efc2894d1aaba5ac20b8c7e35986fa58af10278. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cd97630-548e-49e3-8f49-0bb16ec8acc6.json and https://artists.proofprofile.net/proofs/artist/3cd97630-548e-49e3-8f49-0bb16ec8acc6.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 0xf07df31651021c5e515eba581e9d060c7e349f1ac1d03252950dbcb34cc34a45. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:53:49Z), 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/DEPI82432943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43a3b176ac89de0ff2e8e210953b4c0722592ca08a495f039c7d22c04ce1f10. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:43:59Z), 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/DEPI82433464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8872318751380cc8ed55a3148f0581482a61c453be70d7dd4810f57ad2c45aec. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEPI82433115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01935151a3742015433a8745929354b792a536c542a7d92ff00aac29769b26. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEPI82433468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3023122228f4f120717be50c1ba533f10dfc0577ec1ebeec10e57e347e32f28. 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/DEPI82433463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5ad225d584f9b8d5de0d4f06791e09cf322dbd578b30c33fb19bbb048d4bd8. 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/DEPI82433467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bc4f8a1dbfbfce81a08a989bc06dd04b66a01abba1f1adf8de1a17b892c424. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEPI82433178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca8b95fdc4c454f9cf86b131fe86963c44e4e79f8bfd273f2339347d946d7a0. 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/DEPI82433619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aea7fa445a9e814eb813128975352d6eb3e42e16a0d7c2a658398a5d2e7e6f. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/DEPI82434740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574bdb5dccba4e619ae57f4c1017c7a2d01886b2f53d80fbc7e4ea8e0bb573cc. 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/DEPI82434738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e6c40b70e44a73c05b008b10a2d99bc25bcb6c56628f1e914313e076b98736. 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/DEPI82434747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c1012b7f7a553ee4ebf8fdf5701fec688a028395a14cbef7033ca22d997ea. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEPI82434752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3dcb27c560edcfee3ff1ac3b1b861fb98eba04f09a89c707039cea102ec92d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82434750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2674a44c7b972549368dda75a0f51732da1b88a53161a690a6823febb22fb8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEPI82435026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d03ca4ad47a731514ae586264b445bef58e515b0b86398893597bdb7c4a3458. 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/DEPI82435029.