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 0xeeaec9c53e43ad09a71f21f5eae8214b2a588fe64cb05a6786747d194906cb97. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcaef197-ecf6-4db2-8bb8-dc2eb6d79986.json and https://artists.proofprofile.net/proofs/artist/dcaef197-ecf6-4db2-8bb8-dc2eb6d79986.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 0x30625c37b407ef136cdbbbb6944a49b05055e228f1e468332acac1b161c7f8ee. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:36:23Z), 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/QZDA82140445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2c85dc10d00c85ed16ce20e2aa0712fc92a51b5c2bbe933b1a71991fca6a3f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:01:57Z), 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/QZES92182521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ee6ceef3e26c63422e4ddc745fc989f19c42bebe442fb3ac631851ac805b86. 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/QZK6M2105646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58078a05a63083dd74a977f50cc40a4daff0e4d744ffdaad90cd61975f6a82dc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6H2113818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba98ff57e7dbb645d98ace6e76e07fb629d9f6ad27630bc93237bc039df03f1. 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/QZTAT2135575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4c2cd2b5504df418cca660ff146d33729c39bbc32035679b5989acda56f8f. 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/QZDA72209868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5a1d12cb9c6e93f3f04c122d36244fea3856fdba572d6ed67129c1b1d536e. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZK6N2262433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d9ddd0e1eae95c33a1536e81a55d38843bd543cf2f418404786f057fd7c5e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6K2286914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0505bb430a3a941585c835a071f208bd94636f51f3054dc53e9acdcf035661d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZPLR2245068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81690d08636c35433b961bf9804d28e7d7b32efc71e08539fff49f977fc8d0c0. 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/PLC062246493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac914b13dcc25d2bcb8cd30eba11439158b590eed2ed211a088eea7115f8d7f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:36:20Z), 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/PLC062256930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0d2d96cb03c8902adf922f5272d881c8331e2939bf7196c581aa7f5b16ce8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLC062373474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bdcd54b5226ca46703c4255ea1ff7b96cc2bcc2757f7c17fc732d7a9b0489c. 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/PLC062403008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29972c3a317d5d40963bb8017e620fcc0ce9449b12a79a3682fadfe406fb509. 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/PLC062403009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3a0b73b52fc31adac9abcc146f11fa167a6661c5134cd1d29b3ce7856b5d7. 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/PL2DY2301793.