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 0xd67aef7cd0f9b4fded7b5a86994551518fac40550a6886e8d4b1a5f09498860e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6fea5c2-b907-4a79-94fe-f100b5fc2287.json and https://artists.proofprofile.net/proofs/artist/f6fea5c2-b907-4a79-94fe-f100b5fc2287.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 0xbf33793975b22076d1337a43183b1a085551fdbef70ec25e873b86da80e76078. 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/NOJWG2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7363b46a195707cb2030d5736a650049d7e4b04d035374e3b9045f207d1004d0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NOJWG2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980fae1fc2b94b79b2a7b52665849d82d4a21677afc6906f4fb343a3edcf258e. 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/NOJWG2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed7c57e3818776d4bd40c0de50d22fd8e5c1c9c67eb2da66fa81a3ffcb929b7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/NOJWG2401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4161f11fc605b931f6cac18bfb73af33ec9117775c23ebd8adea4fdb3d4d851. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NOJWG2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf463d8852db5d6cc086ce2a3d69aedc6703a0d4920eee3491e990ddf326cd9. 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/NOJWG2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be8a43b1df560c03011989f2044efa9e23a757cd24237ef20850af5b3eb45d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOJWG2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0801a71edcb0a2111a5f28d11f5d49c57f0efda2b8da9356537815b7377087c7. 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/NOJWG2401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bc9cb51f85a2518edc32dbbbbfe3b73679ff73b52202a0177ffcb84660996. 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/NOJWG2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8fff20d5b4067949afa4e3ba7b3572fc5e4da0216d043ecb63a7ed24080941. 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/NOJWG2401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f855afe247cc50557085e0212c42fd0782b7d24adf9cd01132e2627fc61f81. 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/NOJWG2401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905d2e0578309fac476e7bb218a8a33ec2dda7cd7f8a6539b0e621d03f2d95d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NOJWG2401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55f44f3eeee06c8bd7481b96a6a5037f1ee277360e02cff0135ea0ac4342da0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NOJWG2401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882821aae38549beb79c9930fc9c958e89b74453968346615da994efe9381e58. 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/NOJWG2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3adc8a0606125aab7279e3bfd6fc015b03dd277eb7aed5034bdcf2825c0796. 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/NOHMA2013100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d2cac55da68e199ad84f54b39f7411687a4b076219559836409e8661ed0d0. 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/GBBBC2301130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d2cac55da68e199ad84f54b39f7411687a4b076219559836409e8661ed0d0. 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/GBBBC2301130.