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 0x403bbee0b6f4ab2fa2c035945050b424aeb1bfe157aeffd328e0043c78c70a91. 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/64d07736-21d0-49cd-8d41-a56971318aa7.json and https://artists.proofprofile.net/proofs/artist/64d07736-21d0-49cd-8d41-a56971318aa7.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 0x54196347db34a27edd09f829f3571efac1c7055b93fd94b60c3983b1d41433ec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ42185650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d7cecfa5f7c0317aad0c212adfdc3bd4d9430d0dbbbf9a5193d0e9d46307d0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDA62174613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d931e003ca9e07204ff592bc8800fb6590e9bd2386c8d93c77b5d7bf712f845. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZK6J2108558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889eb6e8ed7c6da55fa2c1e363d41dadfb8d2ac82dc92887d94b25a3ee20001e. 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/QZK6F2140866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b7663eaeabbfa35ced69d3fbeac4bb248892ba0f08499f7d93a5eecdd3485c. 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/QZK6F2151089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1cf5ca69d32a9ec71dfb67fa0e42c2c4dca51a75f4376b696fe153ba880b0. 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/QZK6F2151090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626f1f2cb0471a419acbedd118af4c38cf3df9352539ca985e635ff4c26a3991. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6F2151091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ace91467a063bf4c30d81246f2fa34b35e2e64c30b00e37c6add77ae6848e3. 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/QZK6F2151092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40914e7c5073311c22475b012a22473ff0bae564e1854ce75ae8b01e6e32e19b. 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/QZK6F2151093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986a653c13b0b5a4a8e1641f81d2425ea77e2af09520c10791c5942158e13cb. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZK6F2151094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad74a39e4ee9fc62e9754560690dbcfd3de1fee1a319207a3c967b4906b10f6f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWS2151834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0689e5312946319f1c2ff422dc79bd59b2500b0fac97a4a7cffc57eee2451c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWT2147740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d49cd35be407be3089f7bcd6bb374777edb573022427dacd24203d6c20240b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLS2185981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8178e0b70224dfe8fcc10397d69bd1e12acc978a81375ab6660dca1c01daf4df. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN62229092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9e9bebcded9fa1cdaac3be395195bed2ad6245d139820f6146acb16c4fa7c4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6M2287855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e0f4776d1363b850a2e91620e81fb817684d4bf554c2bea6ebdadb8de828ec. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZNWX2249195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0618aa254b7fec104b8ff80cb83208d1b9ffff0ebc6ef0068d571b93facff9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZRP52215400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7c5e4f5a2891451a82e355861cc83b74ef9363fca8d552987d08ff1335cdf. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTB42261891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689367065616f4cc78be88b1e8f9a6fbd7ee889f8354328a998b8bc517376681. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZK6H2379518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33974165cb276cbb6c1bae1abac8a9ac4154ee459d125b8d10abe89c8e4f0268. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB92322718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e824db58c94d7cc01492bf428e512f8c98a13c9a13285129adf19e923e4f4e0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2446057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b689f741faa9c4b1704838d880d6e061d8e9bff7973d1c8b9780d0c0f75baca. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAZ2413444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba03bf0e9c64d6da98a6a907682bc0ad20d349a633d61e9ebcf06a3f4028978. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3EX2413733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d24878b17685a8e124f5c73ce1af9216e8e884cdf6ab1f82016261f4b27adb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT3F32450775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a074a07d18c42af7c4259c753328b56fdddaf42c0c98106b5f8ef3ed13f763. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZDA72557051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cc9d722f1c3d99a1706aad3cbedba5539036977ab254fcd5a16660d0aa0935. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6Q2521290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7acdeafd1017f029ba01ed3ba00305b2df3a6e00670a67abd0520305d56b40. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEN2564489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739aa16ad9b8b980f71f0d48434ffb0052c379f0747150245915d0bf9299391c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTAW2538985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1123cc1f3622afca5a753769093f26ca3e889a4bc4cfa6841bc676edaaeece6. 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/QZK6L2459165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64db6277b68b209daeb69e074c56eb057fd5d4b466a85ac2ccbf1ee5ea46e0c9. 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/QZFYZ2316340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02948875d883111da647e1146bd8ec88bab8a814e4f9e970d500d855c92b5227. 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/QZHN32120283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2664a538d85487ca00387517f90904a2a7bdc6576e26506a614bde5fe9cc0f. 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/QZNWR2357238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d72cf52e59d2d22b22128c4bd886c700fb972ff0661347a027646991651185. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZTBC2473286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d72cf52e59d2d22b22128c4bd886c700fb972ff0661347a027646991651185. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZTBC2473286.