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 0x04f940241d516cc54b874af4d96f3e9fac07e1e9f6725f9e818ddd97b0ac7703. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/961e03e1-c17c-414c-9f51-018ad52566ec.json and https://artists.proofprofile.net/proofs/artist/961e03e1-c17c-414c-9f51-018ad52566ec.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 0x43ed2ed9bdc6bbdee6bc349b5de7039d4190167cbc707ee4cd6ba95e11401d00. 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/BC0PQ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3994e1a0f89f2127cbef5e8d7c995223a6c5a4c93e9c9046dbe5ab2c001709. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BC0PQ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9cb820cc78129c641594adcdf571a011de7e78160db4eccd9ece34caf843c2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BC0PQ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc22fdffa873ade4ab54cbacd7564cfc1a56f2690c1d43c67794f0f0660a51f4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:15Z), 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/BC0PQ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920b978fac72f19e9eb71e45ed896bd5f89139833ab4514508789669e5575f6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BC0PQ2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf231e11f2ebfe0bf256c9bc37206613b4b5d21ce0b48431898b5bbe7d4f42a. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/BC0PQ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493c7b5b7285da870c21efbd4a2ff511e605b10857fc469417be2570ba8eb4ad. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BC0PQ2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0218dfcfcc129cf28d14a0df9f486adf27bd4aa992226389c1669466d9771. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1974881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341b37e0102a6b2aebd8d466f4e2247314cd9729ebe032d19ab13d77bad8ee24. 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/US7VG1973437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8501c6d68da62f4433ded3bac90aed5d239a82d606a3773ba6ea4cd464662c7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1973438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1c681dc4f8e7bb84bc4501c8268d65bee04268e1d4ecf57ca4c9b0e19dfca2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1973439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea25607b3420d8aea110b9a8385d253fc617ec3e8302197dfbb5d074b070c208. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US7VG1973441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eea9aeffbaff9628c006cb08013320cb67db663b3fcfaee78a23fa58748c763. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1973609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79b20d52cc342fa819cb1cd58572319a734061205a9f5b950873909ea8b3765. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJY2112144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84898552e26f875b8cf2025fb0741bf60ce8742c5f12d9e5a9f68ebb808f2bc. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US7VG1973440.
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 0xc60c56e26cbeb280371b17e0f95a950aa77aba702da6f83815ac2d9a63371168. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BX2R92000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f38f9ef5801e270416e4e63b827745ed001b61d6ad17bde4b25c400108b0c5e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHZ52081677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0b431b4fd8a139e8990b96b9da434fc59786d6b31599403270258c523e687a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZGLM2063825.