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 0x597c74da3df2c1699140e4de54fae7f2f825db400759d8e676cad22791d9de97. 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/ef6c473b-9928-4a1e-9384-0a69dbf5411e.json and https://artists.proofprofile.net/proofs/artist/ef6c473b-9928-4a1e-9384-0a69dbf5411e.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 0x54dd029f6862ca705ef4c4601e0a342f3b89424804d8efe53b8e3c1be56c8ad9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ATBK71200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ede80b06b58721e0cac001c304056ecfa919dc1a41e39f1101a9c390b5b3f. 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/ATBK71200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da6fb34c1f31429bcf1266e996c513fb3897b5398056aebfbd792b0f589357b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ATBK71200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439616740153e5a3e8ec60706c2ee8327e1c62a88a8fd4acc00950b84765e14c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ATBK71200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2263c041676cef9a43e132f3ff2ee3e0ebc9e66bda604e7068017a86c1a14bb. 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/ATBK71200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b15d54cf8ce9a900c0fdb163c3124562bbb418f9f17f9e884777c451299e7c4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATBK71200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5fb911517bd129d9cbca81d13ffa2d5070b15335e3dab3276628ad9da2a013. 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/ATBK71200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9557e616e26f8d14b6656e0008477369c36e7191bfde6e3881b5489ec26b312. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:32:21Z), 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/ATBK71200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed471f6a0547cb59aa9c764de11c8c494f43f1ff7c3c4c03d4967212782e5d7f. 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/ATBK71200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef692649e048317173c1a4877377f4bbcd5c0a68123e40ebf75da9703332046. 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/SE5BU2507038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaac83a19608971823e526e407c315b2cdc76720dd7dd070a39ec9ba338fab19. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5BU2507042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b3cd6e83b373002dc24e92502f9efca19e3f98bec931e044de4e4c4c772c68. 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/SE5BU2507044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba25bd63d5816375641a45f7ec07f8a5ee31b4687dd967f1e4c600d7d59cad1. 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/SE5BU2507046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e48dfe1a844aa555d886aa0ec1001d56d498ea44dbae784191950df1a976fe. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ATBK71203189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9461588ce951e216c7a0bee779f1892909665ec60f6bd74a04d555a5ebf3d50e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:17:49Z), 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/ATBK71203190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe654a4c59266b7b3bc1e7c0247f4758b0cbffca72f4375cc195b857a093f0dcb. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:36:38Z), 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/ATBK71203192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d47f073d72a7c4d53f66a7a6cfd28007e2be0fb313860c6aa39c2fa8d4f06. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATBK71203193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f86f56a254af9a3d5563193b9c6aa4f73f3c846b54bf54fab99314ceca5d3c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ATBK71203194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9582a43b8c998ac5b9792e64a2945c5b075660017770f8a256ac139534005c5d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ATBK71203195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf31a97ddbac5f6701737c51dbc985e1f21fb9de8b874c7783f6cffaa977a02. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ATBK71203196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf022c4a4dd14cd1aa14185ab70b8d93523760a226c5849d0630843c7f2dde31. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/ATBK71203197.