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 0x4065caea75f969e0bcbb56b2997f87c5d0af7cf0ce4a3804af83ce63cf2af56d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7482524b-efac-41e9-ae97-05d7687781bf.json and https://artists.proofprofile.net/proofs/artist/7482524b-efac-41e9-ae97-05d7687781bf.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 0x83c2cc51ed6eeb3992efb52745eb0cd2ec731410363b1e9807bc5b12a8a68a7d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBSMU6830924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021591a98bc2a1ec504b45551ea50046c983b3ee644a48bc6737e14f5d45c0b2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBSMU6830925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6290f435ca0884f9724e6616455b892feb5a0a7054fd507ba630b9db79d9cc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBSMU6830926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd44d3bde1b8586fe889b1444f2b04978d9c7a9a2088075afcc9321db85e712d. 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/GBSMU6830927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91263a230a4c34beb495421d2d27f04f06854d8a3573990ebcf74e774125fca. 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/GBSMU6830928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30b5238e82dad8c74f04a47d03399a7c2534e6cb7caea8e1415a84409f32f30. 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/GBSMU6830929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871c2f0ce997381d9a2db6166d7a22d234c11952f1ffe072ce8669ef19f1d0dc. 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/GBSMU6830930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f00795d99e1d69783857388dd80d08b9833d22949ba4a5776ee1a5c95379ad. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBSMU6830932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8900013a136c9fe4812d49a3eb4b6ef06de886dd7b7fbca61917fc250267ed. 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/GBSMU6830936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f67fa0a05fa9156b05752d2ff9218a27dcc17bbff99f03f1a3047d85ccd45. 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/GBSMU8223231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdc8801d25e2d5fe830447accc712fadf4ba6cfd2569172c55b483304fcf815. 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/GBSMU8223233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19668891f1c433859e57302ee477c6f66e5113f2775d50f6c9d2d1dbfc02db4e. 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/GBSMU8227457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258fdce2f634316af4a93d0b3c786d77104be596b3a4a1be33313348d4b26ba3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBSMU8223323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7499b5f4c5e486e0db8dc536b6931fbbffa80278d6c0a9acc6cc2dee8054036. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU8223325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172470864ba678c80567f0040593a56201dc2966873433c6c57b301f4289d263. 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/GBSMU8223326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5407033d1933db0356eda95380d149c57df2d976ff861b9cf88dbb18ab9ad4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBSMU9041043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb5c006b6e5f96c0edf8339a5195defeab34c1b3dc3d4fb8472950042f34d09. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA52581176.