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 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 0xa08a25e60a08db4682351523b5770a52b22445d0c05319bf8fa62d7f9aedfb03. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32f02cd4-35e1-4297-88f4-1c9ff79fdf7b.json and https://artists.proofprofile.net/proofs/artist/32f02cd4-35e1-4297-88f4-1c9ff79fdf7b.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 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 0x3f92342960ac224db261979c8ad9147f3d585d333be36fba3a758c7f0c5e8f3d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DE0082301185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75804ce97350c0b7fd82208be2a655e608f574385ecdf9904908bde80959b850. 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/DE0082301186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34459fabc790b4da4a4216884f1cf55fca364ecd50b03c5130e320441b6df20. 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/DE0082301187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eface8c73bfe1c07bdebf2b97e2fc847815d9792e52cf8db6899d866407f4d3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DE0082301188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a3b805bb9239c8fb0bd671c4aeea990b931f114f996b1685fd71a8542fdbec. 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/DE0082301189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864248423660f26403ab01fd36b02db14e46b2da61eb83c1a83539dc83f1bf12. 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/DE0082301190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1441c37b5552f4a75f37266b89917341bb6dd9eadd16873cd3b4f3ab3f16162f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DE0082301191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f3b8ed13d0c702374490aa5c6d91c56e09d84dd2d381ad6969f597bbc41354. 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/DE0082301192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aafb979ed46cc606c000277054e420174b0849eb41bb38440636e1ba76449d. 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/DE0082301193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77165aa4d9223f2efae10baa064f68630e5cfc08e482039964109b58898ccaab. 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/DE0082301194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ca9694c653075097262944d5e14462eb3a2c46bb8edde5361905f66e5e0386. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DE0082301195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e217ba7de8b10996bf6d7f2b156cab5795cc557f8bb55e8a93625d748df65de. 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/DE0082301196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd631c9a41761cca816cd3bfcbca77d379a82895712a20b70e0a1d178c2bcdcd9. 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/DE0082301197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121e8ad557a41133d16cf893ad192862f6273e7f836748df5734ff9604f2d295. 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/DE0082301198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794cca9ebae14a605ba32b145db505cab588b1edf61f913dc0d04c85f81f6f7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DELJ81933966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0527116bbd11249c454e096c5e251a5b9a89ddbe5c9db9a46e78828cc6b23. 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/DELJ81933967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97084ec8f129efe3385cd01e2598eb4577bf3d2e586e8d2d4b81daf50f870cf9. 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/DELJ81933968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea85b7d2eb3a94190e21b787215839bc95515c8c7e22771f352b49491799d24. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DELJ81933969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81997adab93af3c34a1844b30ced0c468b01723b7f3bbef1f4d1371a9f59ccc9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DELJ81933970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd247fc6e5884d0f263a18334c76b21ed5e7b7b4099f244eaa1ad4584f5594b6f. 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/DELJ81933971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a8931a3b26d646efe86f7ce138d6c437a7434286c35067d30b46566eb5af1. 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/DELJ81933972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7ff8b020269a2633fd7bd91ddaf48ece1a882f6b1e80a805a1a838168a6bf5. 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/DELJ81933973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2f3d72b04326054c4805f2d0e9c926e969e6759c3d55dac9f50aa94684b7ac. 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/DELJ81933974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe16660039f69143ce0ac37a085c9f2d19fec3c7d6b64ccb2e2f7f5768a82bd6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DELJ81933975.