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 0xb332ae3ab7cdf7e514260b021b78be1056f9175086e3d862b38c79bb301a0449. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2da1c13a-c8f8-4792-ab89-fdb222791918.json and https://artists.proofprofile.net/proofs/artist/2da1c13a-c8f8-4792-ab89-fdb222791918.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 0x94c03ef36525a0bc1b300c46f677142dde192e3ac1a2d0b361ff99a95b04618a. 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/GBSMU9787415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960d650e6d49d74e3b8292976027a662b6677a2055a2b5467d0e2524976b6f43. 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/QM6N22116163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1d924d675e963138306a3c2733901225304a884b11c73659f57936cccf9476. 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/ITM2J2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf724b660c9572d55b9726b1d8749d0c8d8b31c7a042158e6800123ac0167f9. 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/QZP7F2382814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df3a06ef6d07ee5612e89adab675345fcbfef976598b87735e90ad2d25a7907. 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/NL2QC2100808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2fbe397cc36b178f28ab09589979ee13570ca583f9a5eed7cc6ae068a2fba. 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/CA5KR2286778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b4078c4bd7aabceac9ecacc6784971e6783195f17745bd9534d86f26b2c7d4. 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/SE6HN2233347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324b551f7a12063a2f15098b8b27884fe1a398e7320db491d755cba40a7c72b. 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/SE6I32183931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5552a27492c60dc59d6a52d994feea26c428788c4fe9c4f99b626fa8b3e0fbec. 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/NLT2H2100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17db403984eec9c9974ff5aad8171685c9be83fdac12db6e3f4fab9987ffced4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR10S2144013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412ea8a4bb9b5c1ee141ae5118579d4034611d55a8b2846c512ea146a520f9d4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU9024681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaee7007fd5068b018fe6d595add596ee623520163c4906c8f12a2db256adf9f. 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/QM7282002519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23465c5f50d03833b06053b0986812870bac563b367bc7de01bc5d3360ff19c. 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/QM6P42050152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c80781adb04b724c16cb20f360e659c5bbf1b3c8094bcc7184837da9620e287. 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/USDY42045737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4d172b0c593096117a6828968ebbaa7b26b7e3d947ae92d1ac8f02e55bf7d7. 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/NLT2H1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba2da045f3fe512d6035b66bda69eb491a9113436399a7b5abb4b2e596db5e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEE1946479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9179c55945452175920f66a74001ebf4b075974e732a8f46c1e3eaac6a0940a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZKDK2164750.