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 0xb0f0d95c3a8317eaacb2b6481489863b3f684b837c100b33cd31392de9dd6920. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07a93fac-4425-49e9-a602-f335a24a0b9e.json and https://artists.proofprofile.net/proofs/artist/07a93fac-4425-49e9-a602-f335a24a0b9e.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 0x16a9b698e542f17efb2df3044b59cd63ae1f452aae3f7ab783db0509f8408d14. 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/FR6V82518069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf930e9c860f3dda2c892d098cd045ed35125ca4e2deca673b7c2fa4a01d2da83. 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/FR2X41873463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a199625c30547568cfd45cecd383809031790c5c46b982484397331e2b4329. 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/FR2X41873468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf930e9c860f3dda2c892d098cd045ed35125ca4e2deca673b7c2fa4a01d2da83. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X41873463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972aa64736988b4abdcedf82d666f6019b56423f29c31b63083a3eb9560b8e09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X41873464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75cbd058f5b0c056234a8bb7b4c8e362f86e7e920999eaa667164a6b9d47213. 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/FR2X41873465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a199625c30547568cfd45cecd383809031790c5c46b982484397331e2b4329. 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/FR2X41873468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9964d5a77e2346165822dde028a079d3c4bf3a786b9708291f91f118f5484d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X41873469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c733cb06f2ca8fc09979f603098d2d042419a7e28963a6d78e5953840db2d1f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/FR2X41873470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9dfb936e54249dd975709b14f717106e6979ff10a36a477cfd2546f88d8f42. 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/FR2X41873477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac08a63c5f9902489357b2fd78c61ec436cdb6ec55088226d515091e9f1b140. 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/FR2X41873485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6523e60212eec4efa00d727b3685be70d6c7aacfe15f28b8979efe5727568. 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/FR2X41873486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa878d5bfca2111262649981ab51d74c0610f90fd76ebe21f62740820121b823d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR2X41873488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95f449485fd9a6203844d55120b2232245559d85f25c331023f403c317c018b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X41873493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246de93e3cce97495f9b15f61b829b8dc9dcf430b82656ae97f8749c0ecc8a5. 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/FR2X41873497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad62c0906fc2cd7c5bca94978c922facfdf10238820f66fc636e12fdf2b5581. 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/FR2X41873499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca7470c082744200160b656afb5c3ffa1a2edb4b672df6ad928fdcb9d9f9b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X41873511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03594f010e5316c3fb8ede3c0503f7b6489d43332921ea4878b9222848614a08. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR2X41874889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7c16627a15a27ff0ed5935ab27f9a09cdec5dd3db21670c21060515f79c060. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR2X41871389.