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 0x1edb60265698b4ec2b8b1f04bc002ecc27888a4dc5bb796213844b16b022ed03. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14f4ea88-640e-413b-a28c-5af1b0be5796.json and https://artists.proofprofile.net/proofs/artist/14f4ea88-640e-413b-a28c-5af1b0be5796.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 0x6590406b401dfe1647b138cff90b7f8394a67f854cd1e7bee06697b36f295f67. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USANG2433929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f778f83f8ca73c919498f83e545365930f4ed2950593aa108b1eee8f33f23b. 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/QM3DF2457552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21edac6b728a75b2828f27fca3d9ac97915b5978e7c80e0491edc03bfbf5cbec. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QMANG2457066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a529d2764f5944deda5a725f47200f60694e69898279942d56654156ef4c81a. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/US3DF2498642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fd1441f48179f73de99a3835b7b1140c81704505c5f057a7591bbfd4ce534b. 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/USANG2425212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bbf7cdde1e6345fb7638376cda4310edf7d2ba4727d938c9ec6a2047d1dbd1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QM3DF2454757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f5ab945e0d1595c763890ea80543b701be9bf4b156c0c7be945b2a9bbbc525. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US3DF2435532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf769c9687becced22a3acc2ef649eb2292d5125985765bb99b1fcdd393c2337. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM3DF2492263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031edc1c467013dd55a5a8fa25bd7c42cd48239411dc345e118e32183134f23b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US3DF2480122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bcb1368ec00397c30f01b90f550a73e0e26f8073b3790b3e5025f80847471e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QM3DF2476205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd50738dc70d37bc5ed33f755b6884eeae9093491abd6889c8a2efcb527b8124. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US3DF2498375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7420bbf09c3954d03540b0709372f288a7ef002428a3bf148e03ead83240859. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:20:21Z), 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/QM3DF2493450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed908d3e92d3a995953bdca4fa52940d8d95c8436c5f700e6422bcb1b6ef11d. 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/US3DF2446714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbca04b18b2a2d0b2ce27946528fe0de18bfa39ac9f9d2589cc17c8f2bc7f644. 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/US3DF2476718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d19a7a979ab48a470e97339fd7af7f3abe56b1467d8617491a7795f308198bf. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QMANG2478631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf616512f6407d957d1a89641faa7586b1a647a070319b03a545a2dc5f6f9d596. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US3DF2412365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d0c80a05432693c1586bf5d312f95c33f38c8925b2d08ff8f35cfc1dae0edf. 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/QM3DF2476341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d644a16c7723b80c2010d04be9ae72957eeec64660b4120f4a47553f4e25a41. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:18:54Z), 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/US3DF2409204.