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 0x35de096ae318e4ff79e98b2d08952edade4d2f529a45574526cd42dcece80ecc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d42722a2-d7ab-4940-bc44-0d3656dc35b3.json and https://artists.proofprofile.net/proofs/artist/d42722a2-d7ab-4940-bc44-0d3656dc35b3.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 0x0ffcb728a7bd44dd4fe77226fd94d28cbb6674840334de0bcbfa7b87dc4609cd. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:07Z), 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/QZHN92496604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86399beeb7ddbcefab77c4fce9db213d5baec32fb20f816cab67bd124e675b84. 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/QZHN92496605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdd0fb5bcf80302306a0f432a7b9cb3fd7a178c5245dc2f2359a74f4e8c352a. 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/QZHN92496607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a8195d7ba02206961ada0ca102b1680e923b232533ec7691ffaad82208804d. 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/QZHN92496608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d57bcebe952658c9b143328ccab22872d5b5c23efd5db8dff767b51e608aa7. 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/QZHN92496609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e65db6254f88e10ce411c63c5d812f72d011186508b2b9b25df2d4d4c2e7566. 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/QZHN92496612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70cc31c4db8915454b7e245ce757c50d912fbda495a5359bbab4018d3dd630f. 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/QZHN32188141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcde865d171127f73f68cc5e1ca1367b7bbe4e0ecb04c1e231a0042c488ae2b. 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/QZHN32188142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4effaf93059b53171656455e0608a8afc83a33620c34c4d6c8c4dd1491a0da9f. 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/QZHN32188143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14134d44cac3f39af6aad66d1a051925cd0c7d8cb381df1c7221921e70f62117. 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/QZHN32188144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdca1b5822becf915c18f7227c2b5763a16c854d16deeaf4e81d2e014e5d6f96. 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/QZHN32188145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2e1371e917c94b20119a460fa5e04b209a31064a60f197301e494cfad26d04. 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/QZHN32188146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9c84c06bd7d98809de47272a986311293a3264d1cc47ecba0e518d8f4952e1. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZHN32188147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fc0a1dcd3a7e2a43c699a2b119af8c91a4115a5f631e999e67d09ecf8dff33. 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/QZHN32188148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a19461069230ec6889df4422f5e6b9eca8aa8ffd2131f090b5bff0e070717b. 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/QZHN32188149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6411d877548ec6f69cbeb8539cd6d5a4561ddb91c5ddc55a1de57ae7acaa6f. 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/QZHN32188150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bda87fa70fc5478cb98004776685327a28e9c90c083046fd70d9d9e4294b7bf. 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/QZHN32188151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed3e0651e9903c5b3fe1994e00daddbb4dc87e67c35dff6e8759a1afbd867c. 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/QZHN32188152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adde888d180da9060df402825772bfcff93e3c13eee13641f4d65bf37d4b5a4. 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/QZHN31966050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd9db4635b6cec6587d7448814dbb8a1115c08486f9ad4f190a563abad436d3. 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/QZHN31966051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2b2187e997add86b66d95f89c5e2b950b21b4f846142307a296a9a10390b74. 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/QZHN31966052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a0f51beb1acd2ef9277734d09fd606ef4ecea43e2ee7bd5be2a30ff3c57b4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN31966053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef26a51de4fae45f7a1723d251cfb0fa22774223639a9cb66a42e24ff05e82b9. 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/QZHN31966054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2495234bffbb45be1096bcf07efcf26e6b83752e082e46028e63905275c5ddb6. 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/QZK6N2168963.