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 0x997f6ba996b6f522a4c0778a594476b9778647fab9e47ecea5d4faabb0e931de. 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/dcced9f0-35b7-43ea-8240-3daccfccb8b9.json and https://artists.proofprofile.net/proofs/artist/dcced9f0-35b7-43ea-8240-3daccfccb8b9.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 0x3daaa567fd210750d61b00b00911a18c1b5f5128a5f174fdb77214cb81fa4476. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:55Z), 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/USGV61010710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc04e28e51116e3e0cf4fa574366b25e0a2d3f8445ecd90b1b469ccea745cec. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:07:20Z), 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/USGV60710212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f783852581b2bedf997f1dc55c217eb25e1b295d03cc2e6e64070bf2e0d93e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USGV60710213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb8bbd6eafb68341df84b28ee2fc714d51d467d67943d46819acef0b12ca3f0. 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/USGV60710214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2b701f8218349e671494e5c04017dfaa3ff213ff2fd11e69ca8896672b4098. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USGV60710215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0385d88c414d6e390238dc86f2d9889fe32879d6717028b5ccb561a9df041b5f. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/TCACN1680228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3558c6dba437bbaf3df1fa23a1b76c1a867a254501d5a10d2c2dad1c6c68ed2. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:10:43Z), 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/TCACN1680255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaff95c76e1361545f9998b48782710f73961d90132fe1a6a1cd66fa0ed99774. Chain 2 (Bitcoin): anchored in block 957842 (2026-07-13T10:08:30Z), 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/TCACN1680282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220ba921ed8d39030ea1e68c68f69ecbe168682f60f9bd43696c2f8ade33b5f8. 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/TCACN1680299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08054e894798d8b3e3a8dc33f2fdeb82cc2e81b479240bdc01935737905b9eb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:39:26Z), 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/TCACN1680403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee74fab47117e7e8aee0f8ed751e65843d8b2e089ce60955bbf93dedaeb88c9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCACN1680407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfed83457b6ea79c0fb2f85ddd731a3dac0d81f2251940234cf57a04a800001d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCACN1680409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97180bea5bb049c50549950567440520f8c0123fe2dd519617c2b54fc2d64ed1. 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/TCACN1680807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263fbaa877269851e86bd7d4f70c977ba37da4c608f0feacdbe3ff6fd79e68a9. 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/TCACN1680417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782c015cfd35ce72409a12fd197f5ce1c5555dd0f31ba1ec534eec22d8a34648. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCACN1680448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b726baac021306133852d9c76dffaf91783733ff1173d0c7410324f26bd2bd2. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T19:07:38Z), 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/TCACN1680798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2130ddd5a4d034916e9f800b06e978961979b36d0233020c84abac638a92422f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:04:32Z), 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/TCACN1680805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93836bb82b97fbecfcdae6e475f5a1a3d1187be12d98128a7c8bca4af1cd42f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFK2121386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10118e35ef6c766010e210f2822cc983b3f2a85643f0f19522194cfd27bc864d. 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/USRC11702033.