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 0xe2a8a2ca26e583a946c814302afcb969cf7c709897d0ebbebb375b6f3e7da5e6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad2071f2-ee38-44c7-9e64-067a47270cf9.json and https://artists.proofprofile.net/proofs/artist/ad2071f2-ee38-44c7-9e64-067a47270cf9.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 0x349cb84749d4d1d99cf508ef56b228133083bfc15933a89698b6ef131f2970a8. 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/TWA532200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b121a8b40ed79d3f45f45c12593be42aa247eaf38066e0f1c38c29e7bca76e. 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/TWA532200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e836655a6dbb1b29a02b8211d12b63545f257caca742cef2c192b81e4b5b00f. 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/TWA532200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e597d07895978ef6a58da400399b38aacdbeb3e128f248f9f1d5a1f4bdeb3c1. 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/TWA532200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2e3e64df6d1dfe7959b733d6926a18f78202507a9a9c4a911bd7bd1973b95f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWP012467103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5f1f907ed03efedcae73003e4b0cf56a28819b41169ead1e64a36ba35d0bef. 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/TWP012467105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a55b8e1f83bb9bf1c54cc87a9eac482756764e2589cd90ab011e629688c7b5. 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/TWP012467106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca32af29215d9024108886f6a262cf1f7557df8ca8adbb3de3f6d30a39a58580. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWP012467110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acbf3b3de99e31d8c9397418c2e929f0b7bf8c26493eb07feefbab4416e6ce8. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TWP012467101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adcf512250354cdd32f64e6e9cb0e8eb9d4b13f6e2bb2d14f77431b5548946c. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/TWP012467104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda6c01e3f72206d0a48af2a439ac6e2859867418ae9bc6b3a1c73f8932ab76d. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/TWP012467102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd411180090338b664f51c1ef9e52498d821a73a51b4a124e7fd344df00a5c95f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWP012467107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68980a54b4aff3a5f6ec30cf5acd43ebf1e973166d2b6fc5bbdd710eb7e92131. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TWP012467109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6748a874fb5098487a4f0b7e51e9a1a0d7ad359c3f5a096d4e84a58ba181ce. 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/TWP012367101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609e0ea7de8d06d74a6f32e8b810bbd1e65712be6767e0704c954aa7e0e3f05. 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/TWP012267101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa598953306d7ab276a52c2dea081d0d01468ebd4d6e64fa12df33b2bebc4de22. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TWA532200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afea97e7d897e603f31f1949bb15094878f3dc26d91d88906af5966bef9789f. 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/TWA532101046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60318b8a5913631120571c8462a6b81e36d5df0c0850c9ff452d8b939ba6abc1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWA532100834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9865db5163e1fa321437d98079fd91f89b3dba5ba8d59ee833de6d2d49bdc53. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:31:16Z), 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/TWA532100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887f9f344e4ed337be4567f77af1e3498b70a56e90634f225daad7e35cc09d8a. 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/TWA532002627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449b30cd85cc5347478615d9975db7e0dc3db25506fb23b88c21ac0accb60b5. 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/TWA532002048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad44ac6591e001cd44fbbb30fce16fa56662608ec3eab3d48dcde39f1dc475. 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/TWCC32001379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de239ef51fe5b5382c9ef8fb728ebcf5c4a3d12f62618884f789b58ae7c4cc5. 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/TWCC31901471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12dfb6df60e3b70fd9ba7e346b68014573375fc24dc92c2b037eb04eee1d822. 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/TWLZ32500001.