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 0x1709b30bc70c47eee3a34c1e09ee2008c73a2246811818f9886aa7360ce4fbb4. 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/2cc2e2cb-c7eb-4242-9b1d-f880e37c3d14.json and https://artists.proofprofile.net/proofs/artist/2cc2e2cb-c7eb-4242-9b1d-f880e37c3d14.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 0xc6a42f11311ca58b6fc66f79e751a802b82afac8dbd589c3c6ce494e5cf8d285. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:32:41Z), 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/GRPA12000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e401ed288bcf70d4fd5feb8cc85970088868a619b65717a51abd08d08130b26. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GRPA12100420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255d68beb2f87adb67506eecc65390f28e1f92c7705d8efb394ce9e36791c1a1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:44Z), 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/GRPA12200428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4bef1efaf1f8e9945e6a4b096f6eb21aac83f263d12cb6c8fdede3f8c32e98. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GRPA12200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4bef1efaf1f8e9945e6a4b096f6eb21aac83f263d12cb6c8fdede3f8c32e98. 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/GRPA12200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d36bceadc8ad910940e59d354f23782455fea36695d1fc7fad682c10c072b5d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:11Z), 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/GRPA12300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060fa013e14eee1e1efacf3dbaf990a38038c1e04ed5e48a24d9fc15e4663102. 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/GRPA12300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea30e12e23f3d16db56188a7d662f2b16f52069da2f25ad730b962f7121e77bc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GRPA12300522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38b0dc54c604164b7219861205a60ec01bfa83e832e751ca6054a3f512080a3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:44Z), 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/GRPA12400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca196eab8316518ae728c372e81ea29e1b505db765eec806bd91804baaeb169. 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/GRPA12400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93372a654c43057df8698d76a4b0a653bd34322e47c050c0ddf2ce1be705a9d2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GRPA12400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c46ab915681760105687d53a7e24a80cef5a69010c2b4a0bcbe5951079a967. 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/GRPA12400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5648c796858a45b9acf088bad1d693b43effc41d1a763629ac8e4b037ecb389. 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/GRPA12400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd6683f03f50b00cba186c63ea32a72b2b435771b1a1a1563db0fb127e56b46. 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/GRPA12400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d53c48bacb649d66f181deada29381a08b131fff6589a41d4520c0f301de4b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GRPA12400724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba3b73c3ec3253ce0734d5927c32f5b08646ef5af6bb2d3dcb1c58e036bf04. 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/GRPA12400734.