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 0x94e3d09ae7a6df89ce8187f477473e82c8e8e38e51b957faecb160b03740c1c4. 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/21f5d22d-00f1-4946-a7e6-8fb53c2aa94f.json and https://artists.proofprofile.net/proofs/artist/21f5d22d-00f1-4946-a7e6-8fb53c2aa94f.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 0xf1766f1de376bb8b1b5e0a029897614b7ddadb26024976a942a16f5b99f89666. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBQLP1500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275bff1c4f404450b6eed77ad05db561beb4ca150786461f79f42aec61709811. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:40Z), 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/GBQLP1700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217025951bcd36b146d7b0ffec9fa56bc7420fca1bcc71dbd776894bbd69131. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBQLP1700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402715913095076a10edacc8e384069825e9ff43f4d028122fba617bd10de24c. 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/GBKQU1936854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab5b6af5d0102d73f21ec2df71663779394b5ceb2fe1a2d42878da03e31cf1. 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/GBJX32266001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786062b20f65eeb7844ce81f775ba4dd6cdbbef0ff7d4eff8d50ac33a5c236f1. 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/DEG932104958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd96520fcfc2ca5b6852873c6df9f103f3da42c2d46a14e1d8f0979aadba06. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEG932104963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d1bf902ccb6330631b053704b28ed82d1f9f3603d4dda938c12d26cbbd059. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GBKQU2363710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6cc11927648ecfd75b4d06f326ea2ee7c9a2252c09d583952609d1f22d7a62. 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/UKN6K2401317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2059e97b4872b58853093e3472db85ccde96546d7e2b5cf1129ea10ef78ca72. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:37Z), 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/UKN6K2401318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89120d2ffa729dc4584f99ce6301dc768314470afa174443d91fadd092716f9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBEFR2309272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e694651dd8561c8725714aa6cca39fe30e2de402ad56082be2b93bee8cc25c. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GXF5W2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84737cd0df7506aa12e4c46346ec9f30ebef4266cb9899dbc5421cb05e8ae525. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:28Z), 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/GXF5W2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9e0aaaceed76f5325fed6e46541bba57a2e6188e5818ac8e75458429f6ff8a. 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/QZTAY2540179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ee4e5279ebc6e75f54114957920a3104fc904c665e78e665d89c88d385d673. 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/GBJX32263053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba4abd8cdb52c10c6826cfc8d3462157a1b7994f14411ebf74f55cf36547505. 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/FRX762261837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7600796f155ef4c6687055fed0cda35cfded2c351422ab12371a908c35bd9827. 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/GBQLP1601082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66904d5205ed362a4d0acbdbdbd688278d04cb7b9103fa2d6483ae1fd596f5e3. 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/FR26V2018859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d96b3dda1f450220b307c036ac7e620e1514a864b8a1d1b3b0a6962f4227b5d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GB5P52000060.
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 0x4ee988c4866796944a7339e533e42df0660aeb6591e056cbd944e45bafdb156f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GB5KW2305656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5940e1bc4c7c88f1ddaeeff2adc407dfa3931654ce6cd7101a415b70df2d4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBEFR1908954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cf17115d7c3028e35720a5e3afb10490c4064f3a12337860b7a5d51a724a0c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBJX32012015.