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 0x0973f4dc5f90a6d781fd893bd09878c921331dccd6ce38e9af883520262dcf9e. 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/c27e92b0-50c2-4eac-998a-5a7026d9f3e8.json and https://artists.proofprofile.net/proofs/artist/c27e92b0-50c2-4eac-998a-5a7026d9f3e8.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 0x96f40f27f9338042134e9f17aaf64e913407a40dfd87344cb7996f168e497228. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INO412400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739513799a028560946dfbcce91b3d77f257cc8c7470266b31ee463c940671d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INO412200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6d28f21ccfca6e4346deb33ba507f6827e05328ee978a777f7c73b5db9f062. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/INO412200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476757ae64b26e44c6a399be7e7a5373820a00be87a69a7273c14f6657a4e740. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INO412200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55c8f5cb1080983983cea066e0f90842477e74da318fbfc904bbe0c7fcef47c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INO412200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4282b6fd2cd2f9b2bbed11bd55ab20d1e80f3f86fea66939a02a6eb4d4b002cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INO412200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecfcfd7eb022218b6c2ac2359953ec4c015e5ef3540a4a7e291f77b7a6c5b25. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INO412200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52948b7fc5b364157c45cb190e0085f5f233b61203836f61215cac846f30f33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INO412200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cd5b6b79847fd09313ddf884c17b713c3a3181d90a9e317afab635f812a174. 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/INO412200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe897d44f3af6b12248f7505cf536253f8be3ff436d638e44ab05140423cdfd21. 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/INO412200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4ee6701858e514001ff5f881cda853509cc667ba313d472a912e49f9c7359c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INO412200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662f2cc4c3cb2cade169e7751eb1b954281a693a0e04b4684ed8e7837227d48a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INO412200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614c3cf6988891a04357f47bc4667117ef4ae52c838a4cf40f9401a10243ad1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INO412200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5b42e3085491b62396c7e51dc78095806eadc55c7e7b48b2d44aabe5f7d850. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INO412200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fdd9d56f8082a572641e3acd461379447901e014d52e33b973197c3f271dd9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INO412200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e363ef82ab6269020ad9ee85ee4dff6e49a3c8d75c16ecc034544c82479eb88. 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/INO412500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e20b1c12e5f80f9e4c8ac316600b58e6c08e6a17c5ad9eb3ec25f98524b972. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/INO412400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c879ef81c7eb8d29cda3dbd7e011aaf37609863eddcbe534fae5c1164e50632. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INO412200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876294c51c5af14f42a11714d90e5a7c4e410431f01488518ee86aa55eff87fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INO412400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2992fc4caed9ea27044ac1401ff727a3124b56df3ff54b263b38f35904a2a478. 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/FR96X2398174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62202578fb1d050c12f0048b5e9489d65b544249d1dc82d71e3644e50da9569. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX872157040.