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 0x9977dc2d09cea9ee3a09ab3a0c251d6bdf5cbfac067a6e3684d42234053eb94b. 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/85d9a8b1-1cf6-4094-9dd0-04d830cefb0b.json and https://artists.proofprofile.net/proofs/artist/85d9a8b1-1cf6-4094-9dd0-04d830cefb0b.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 0x074b76d84b888132a42f0ec0635a8c10e3788d377dcae050b02637f4e4218de6. 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/ING120901081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca73499a705d29649bea6c03eac5d6df013b2def126382bff2132bf5aab7676. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ING120901082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef1f2064db1a4fdd80fed935c659dba1835e0e8a08fc4652ae70e09a81ee545. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ING120901085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0ddb3ee5a962fe794467d6567f740d09ed20d24118d559428f46824d95051f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ING120901087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f36c8938fc593340746e20f23041a3ae817e93e98c970ca720d883bc822860. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ING120900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5303d4de240c522bb7d4ca0c9decc29d23c87ccea64e2d1e8ec70db248807728. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ING120900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63bc11f3195cd50850ee66e9d548b39154cb5a883cb868bcc39082705c21e5b. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ING120900268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6828f4cb6d553f4eeb06078b3aca88410e1064f244d7d2eba37e58073b732aa1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/ING120900270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b657b4d09f07f6e233fef1f1edd3623df0b2ed59d07af42193ee3d05150717d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ING120900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140a82dc2aacef7d30f04b511593f8aa10299dbcbd24faefe72d8dc194ac7f30. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ING120900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cc92cf1c59f5ade8b4a095a406c8244dd5ff2ec5eb0f7f9f5fdf45d48c1174. 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/ING120900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab91b550ba755a27ff1d650690cd71a58e25e545466ca506af19a4f654f783e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ING120900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0c63c16d9f0bff13827b0d7a49b5b7b2622699371b85fd836a2c6665179ec6. 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/USA371663152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba69506d2cc1873d6e75172cc21cca0b21270fbb98b5645302ff34c2ec2f783a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ING121500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e21575537896c7ecab75a2a52204f69f6434a7fe68286dfa8ef155ff7f698df. 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/ING121500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08960e231a656720ad8fc0c1a46be2e6f6408fcd493b674601c3e2e78c2d718. 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/ING121500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc1a2d255e54304ed09145670beb9991238a62a8cee6893e5d37be421b7293d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ING121500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01acce388742dcb818c39616af168629e387d90ac02f2c1f4fff9334fa7959f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ING121500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce427d363123da7af7b4d7887ddebd790cc65b35aecac0e76e9d6f8bf6ded18. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ING121500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587b08622d8471079ecfcd2eb2ac26b0c7481d47c95e30f793ca480c3e7c877a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ING121500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12641059d3ad7e726c82726cf0591666ded532dfebabef7590482821a3633821. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/INT281702277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6165a417756efdc9bf215c965527ad7ac03aae58922f06b27f3457a4ff59087. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INT281702436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487a6c2414ca157b58a8cd05504a0d9a6f362e1427c33f6f282dd7932b78c085. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/INT281702551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22a742cdaabc7f56ea923733b8ab15e4056d5fc7cc97d97043e877c96c349e1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INT281702552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21882e4f2ee6445a1986672fb07a9c8d458d6415709ac65d6cc3b202066d8e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INT281702553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6d227acdb5cf5eeb5f4649b98225cd39920eaef6cfb6e003347bd219fb3046. 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/INT281800523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc496726d896a2d4308ccb603fb5c27047eafbf611c1b0e4e0371a891e32a743d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/INA331100627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f84f0730203dc3b6464be4e2d8fc9a3cd29d36d4462f72099c86e66c7abdf0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/INA331100631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13baebb363f3bb707cc4d8a1381e540c08f17479292597f6b2edca0563b0eb2e. 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/INA331100633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89acad941bf0f1d0d4138ef87175375b437a858b857997e65cda2133fd057932. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/INV359800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa42d9265138061b9c898111dc23338f760bd3a8fd5040c9ade641bc4df51d6. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/INH412204720.