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 0x026e788a9f8c6ab4f07e2be92bcca5ab67ec593235d924fa3466432997bd4d9f. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/941165f5-cd2b-46e0-bf48-8dc62bd09b7b.json and https://artists.proofprofile.net/proofs/artist/941165f5-cd2b-46e0-bf48-8dc62bd09b7b.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 0x054782fb33f2612795b1c6e85977bb843a472f4835f3efffba8796208f84c098. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHZ52120683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a52f5d5866c22d0f8d5a868dcbb06626d2ca23aa2e7a5ba1e4e61e8cdf8128. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/US7VG2203177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd187a3cb704ccc727ee3b28dd1ec33ebca5f078406add2e58ffa0c7424129cf2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJW2006597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2401bb124b4ae907eae077f04e8209de56adb2a6c39e1f4cbc5720da3d83c9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNJW2006598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98bd36c07bf9f913398b613d938a58ace36830d7c68ac77aadbd3ed8100bec4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJW2006602.
Маршрутные квитанции (Sound of Unity Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afae493a09bee2b1812645187dac6e5c962c488ad03859184d5d3008affcc7b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US7VG2216712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc62f4b24da47073035e6edd6e0fff0c554c413566f31ab57475fc00b096d2. 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/QZNJY2351641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fba03d4effa9e8b99e20af9b8ccf5de45bcbccac6daf57f0f0309fbb57719e. 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/QZW9M2461992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dde50acbb8b3d3bca5874ffcceefa2bd9cf29b67be1cb7ed7ff9b615acd0c3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUAGV2509480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcad7aae35e5fb94422e5eabd81a97d8d3c5157359ba5666f0a42599659ad39b. 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/RUAGV2508200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7404db04bcda9f4d367da52e3db59576ff92208bedbb74fb0dc538b0f29744f8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/RUAGV2509481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76c79fc6a21e4798bf076a1e735b6e6cd2ae77f776dfe983f749ffb1b36c09c. 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/RUAGV2509482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b912091795723c64838c11790e14dffa0c50ebd52fba5cb129954f068dac9c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/RUAGV2509483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab6713424256239eee420aa1e50f7d3cc138e57c2472da31b9cb87325a0bfab. 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/RUAGV2509484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c8014dab0856a206c01ab9a08c368c457ef33f7e70b7360a9646ce419dd58. 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/RUAGV2509485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee8fcd0ecaf2cbceebdf2bee9d032cb3974c7bb9722d846e0d454a5b4a8a05c. 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/RUAGV2509486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77086c5829979c0ed30199e3bdc0fe42968d40f16c20cb46b9633739ccba5b02. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/RUAGV2509487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55d9070601c2f22a2e207365200d7bf0f5b185f5c78c2d8a0308ef180374517. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/RUAGV2509488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5013319d992b51d46a7f451482142beec07fe00da3920ce86e682da9a81928. 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/RUAGV2509489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4790e5ebe8568101991367f0648c991273d28e9d5e4fb0ff0a8ec75a52257ca2. 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/RUAGV2509490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa135a2526fbe039bcda0a80d975b3f84ba4243ddae50c01885fb325685156821. 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/RUAGV2509491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a0120321c9d636d1e45b498ee94e834d55e9352b565229d66da3d323059715. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RUAGV2509492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24ed880572ea38ffe60591366810169d550a9f98bd7dc992957e4e79a6d9f9b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/RUAGV2516055.