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 0xa84ec332f392f96bd37c1b260907d33bbd5225f932e0b70b33a338ba22ac40cb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efcd4c27-2fc3-4b6d-aec3-f00240866eef.json and https://artists.proofprofile.net/proofs/artist/efcd4c27-2fc3-4b6d-aec3-f00240866eef.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 0xb6376431d2412192045384429797fe097c6b2137e19124ca55f1a82a7ee0d551. 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/GBSMU7894379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e68617ca779bd7a75416bfdbbd7f88afbd5677a6522c02deba7daa706f40f. 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/AUBEC2177202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd6703c0af5802b5cf745d043e714f75d6143daf7cd0d25b537ebbb744b4891. 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/AUBEC2175812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ac38e775e216d7f5a4e796b91e9e34ba7a4dc218cab064e01f4d8c8c8fc6b3. 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/AUBEC2139428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b211de39a8a3d4cf0c84d4e4cd1b620bb3f17738dd3cf6217a3888b28f37e6. 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/IND292207006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e20a3aec4890b5809a2d79c1a2eef48a2409fc4a705131d0add6da6b7a9656. 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/IND292207007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e800a93df413a2bd77c3319891bb68ec1565dc69dfb33489b1b077234a863b. 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/IND292207008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe546cb3490fba2df87100bbaa8b7d62ee0b942aa34863a0b18dd0091e4b9b. 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/INP2X2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63edb5c8101b565d0534849a6ff2fb86fe0299f79b97e0a9293353b195ac3282. 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/IND292209269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7b9bdc63ec589864a7caa207940e60ec85f6f36b79e9eacfb5c90daaf22184. 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/AUBEC2173667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcabcc5e9ba580ad4cf095a04731881e2246ee0e98969683a111403cc6d04d7. 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/SE6QE2179849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3750d32dee60408c258f2f7257160b3df161163140cc98af28dc9909285f596a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2176708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24afdf68ffe7022a5c55fd0da7286adc5118c0e9c5f0aa2ec5c7dd310536a26a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBSMU8158864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe891b6479be916e41755ffd760c841f8fdc19df9b85bb951063be78be495d6f7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFQ2181639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf71f0088a0fad779a9bfcdf9fb61133db6b418988127777942f851fa6c6000d. 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/QZK6K2099058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251eba862a8f04f68d56e34d90b1d6736563b4470cabb2d3165ff8be5b8999a4. 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/UKU762006535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5832cc1c38f452e820a1b9fa9100fa5616bbcb3b57525a78e1184726bf427698. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES82190530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b9c8ed6b11e6621519de4014800f105fcb981cccf4632f88f07ecc4f68efa. 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/INUM72500394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955056723d2ba32d16559bb1f368e86dc2785bb176e23c0f3015a9a55c0203f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42565150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37dff88aa4cff564685c1734e5b23b7d240e66d43b52ae9fd93b289ca921440. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INP2X2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d2d277e6ff467a66f7d50b5d40eb0f02d1837a9d3537632becf5bc6d088b70. 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/QM6N22476225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8651a05e560920a9573825e882417607895ccee82272a7a449c7e0a8b59c266b. 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/QM4TW2448998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8869eb117a26d250b5da864892c10123dd6695a5d6e58cd8d63ad266056f03cf. 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/QM4TX2415286.