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 0x9e0029da57fd5dfb3f16df0cb5452a24bf0ec4599a0f03e98b395dff7913c095. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94e5d243-9e77-4645-9dbe-0542cd6e007d.json and https://artists.proofprofile.net/proofs/artist/94e5d243-9e77-4645-9dbe-0542cd6e007d.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 0xcacbb836b6052906c7c2417b1f497b395476ce5ac7d832d63d52a2062865000d. 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/CH7812421806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe41c19f8830281d8568610484f3ebfc07de235786f6313ce6d225d99e95512. 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/CH7812402205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3261f2e0dc8f7d75e424d13ba3c025c47c4aa62d09dedf3a04830595805ea. 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/CH7812228216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49785b6a39b34378ce3ce0a3a04023e053be1d8b106ed67306691d64b08de607. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH7812223809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf002622faeb72798d4b188a1381a722787e2099d075163d7eeee7f77dfaf024e. 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/CH7812219055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d797ccff77dfc5e72bc3fd22b5024e75f804664928f58e6f6f748ed4f35635. 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/CH7812218523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7489b124ff7da39c3daa6cac2acc94ed40d3e5b2616a56723d5f85d37c5c61. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH7812218736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43aa56a0df6c9d863cebd9ed005296da9fade064d391a10ef019ee230a4c3a8. 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/CH7812195503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6199e14f3b36e99bc4a596ed911262700fc785d831213b53a5530e2fc060971b. 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/CH7812073692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e249f0d667bdfd7516b72afd8043a50cd6b16f3862aa3183491938e9dc51aad. 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/CH7812071513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d32bc8fa14a2b7d2470726529b43c92e6866557606b5928046031c9b633abd8. 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/DELJ82065150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431ed4890783e5e99caad5f188d79508fa7e50391769044cd5b33b626ae086f2. 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/DELJ82039816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8e4948e32b7526b930c9444576ce473e55bda1a4b2e68dd5f53ef8fe4db494. 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/DELJ82039818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f847513e5b87ac0c4d8575c0b66f823d2d512d68050b6f11445d0f1faba867c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DELJ82005549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf537f29b31097284bee7da4648c9704594c375e9add256a594ac1a6b2542131c. 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/DELJ82097100.