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 0x7bbd13ef5c98d7fb30ad64f95195245ddef0741607dc20ddfdee5f390656edb8. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3266866d-9fdc-4083-95bc-74fe48ab1432.json and https://artists.proofprofile.net/proofs/artist/3266866d-9fdc-4083-95bc-74fe48ab1432.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 0xfb7b0b4e5eb59a67bf6e9e2a3fddbae24381ea5cb2d7719d025803e1ec54b9a1. 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/DES091400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663f0382fcdd3aa05895c69b8e83b50e18c35224cb40bf40cd6663fd799c047c. 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/DES091400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2efa62eb7f992ea83ef43fa4515ef659f5eb08255b5ff842fc5a27cbb88574. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DES091400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be906cbb9eaaac6fdffa0ed8babb61c6d345911e19213a555d4ff3f56420f3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DES091400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb04326047b718444d72d0e1737af02c6f41f2e1cbbb058969a96f4b1293b9e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DES091400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc938bb227081333c1e86b4a016a93c6ab58079be3df8812842d9bf9eaaa9fe53. 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/DES091400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93352d116deb4f70a9903855aa89011124bdd85644a98d5e60d1918ad4b16a05. 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/FR59R1839371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a845b6c3e13190233a3a4b01094703a2f8962d44bb05d89a0cee52ed2c328d2. 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/DES091400415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae890f51267c013d5f7b359cbd3d61389a46beb63230174969adf5e2e47b84f. 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/DES091400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daef253e0f8d25aa78d73c3a8833f4737bd3a31ff2016f4baee622ad33f098f. 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/DES091400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb379ae189bf0e3737dc8bfa79aff7578423758aec1932ef894515996bc5396. 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/DES091400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1ad56ce9e151a41aa5960b4bae56c27f35a7179930eb09b69b10540677a8dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DES091400421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7ec5b891b0cfb1b5a411ba2e4ff772a37f8252e83e00b3dc530c9146c88439. 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/DES091400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8263ca282ed2f3c81f46e86d572a273eea97f702bc66e4328342cab13841ae48. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DES091400410.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37360f291a6cc2cbcab374ae377513bb2c46ee6521030313d88992a691c4bd. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DES091400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b3b7f7ec2e4a3276083e85e7bc6f38001192a59aebc93c52b8b658a2cb6314. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DES091400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d412f940e40eb7e9e93b4be215f20f00222d29db811f1211eabd63c355fdf0e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR59R1839372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f5965abfe8bffd28ab593f8df44989f9e19f861e486c9e168e684001603875. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DES091400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79408fb25fc5250acd4bd7c909134517a4e1014fbf48a3c9415c9a0244c0938. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DES091400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25990c1c41f467b032770f2c5409e57fe2ffc44243c7edf4da99a9750b4d00d1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DES091400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e349accfd3c4838972a678e21fcae2790d53fcc27ccd35d13795a84ac83275. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DES091400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf498eb956d67c5a95c9498dbd8a8ecd3a5adbc0486542c1e1f6b42ad59ae738. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DES091400424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54055c6c68fc0721d29ac151fedccebff1eb235beb1cb35717c114c936988b1b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DES091400449.