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 0x4a2f8dbb544c1d8ee563e9f82e256e0fe13a5e48e5fed62e9f1909d36b3c53e3. 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/e13d7366-5b04-4eca-8a7c-a8515a21f231.json and https://artists.proofprofile.net/proofs/artist/e13d7366-5b04-4eca-8a7c-a8515a21f231.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 0xc952c165f59daae75739fcddd90859d4421e94dd321aacbb9c3b80dd3b0c2e67. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR7QS1100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc916307d84f43d36bd99dca51adbeb44b25817fbad385ede9d9e001bde39175c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:39Z), 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/FR7QS1100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77479853b676b8dbe9d30c6f9faa0b5bd42aa9368a74728ce5acd23b77de726d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:57Z), 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/FR7QO1500530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4645d026f85c6ffa2baa2c0c94755f3c6bdbd63d1d906f9c8b6091fb16347e61. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR7QO1500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc799663a3e8c3d1e9a359e54f6b40b5796f63dccc7c8eaddd8890ea738f387d6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR7QO1500560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671b1a87bb8b00edc23ce170c053bc0c0daea5cfbcb8eed3e54ca4953c0fd10b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR7QO1500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757802aa76338916a3d9fe1ce8b220a3e8a45b059696bcbda20e316fb2dae87. 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/FR7QO1600400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3b1c5bc66fa56e24fa802be1ac185dd3ddb699e9c7e1ee67118a07ee093297. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR7QO1600410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483eba9790f12deaae958093ac95a1f3be280254d5faa58c75b40fbc8875acf8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR7QO1600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dd9190f65a13c862a18c0c831124a7bbaf4938dbc6fd5c9b3d5e34ea2079ea. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR7OZ2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6577f932c3cbe6d122bf123923f37187e197dd6dd8a88638717066e1478c0815. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:34Z), 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/FR7OZ2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105556dd1214c73b8f244fcbf5163cbfbc92cbe48f95d0e9704b1f9a5c6e95f8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR7OZ2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e66e4506dc6aeac00f0b8329572ed815a88f807cdc6f56b9afe94307813605. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR7OZ2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61539be52eb31c95538caffdd5af570dcb0d58130778ec006b293686551baa19. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR7OZ2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1410982180e50db136474f2a30b93830030810a548728d2eee574472a6fb2068. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0P2453577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0cf9f8bbda000303e6d2f57113254c0aee14689df671355197ac72f1aeebe8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:43:23Z), 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/DGA0P2453578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5154b0257d04d12b5f81fc45f8fd84adad061c8b2689aba664ab72003afe5011. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0P2453579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46f64cd2fa73f6b414fbd45240563078883bc39ed0d05e0435b307171c7fc0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DGA0P2453580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658021608662e1c8ed4dc22a0882f5cec775933530ade6bf14fa805555e6800e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA0P2453584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742fff7686be3c418e59cfcb67b60b22b7937389b7f1f8fab23168b81c31cc63. 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/FRX201935299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c99f53000c920467aa9e8943972846caf8120a869c97cd7a778d5e4a8728872. 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/DGA0L2458807.
Dub Master Clash - 5 Years of Clash, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb2af495449b97e34399c1b3386d5acaf8ac064f9fca24c7013119bcce4b837. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR9W12123420.
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 0x11f9225ff1095f998a53193938749844e0338be181a6de0b190150100fee8eb7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR7QO1800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbfc7ca9874b27081acb0e91418dcc1cd13ba3611a14f4827fb84bc1d226ab4. 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/FR59R1807712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa324405192a7ac2cdc1a2deeced4089101c1fb2c64cd6a53a059b7d9dda314e8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX281923438.