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 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 0xa51453697c607d28565b32c0d3076236c99695c612e476dd52f7a2dd81e3964a. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08af646f-49a0-453c-a14f-1d284f569157.json and https://artists.proofprofile.net/proofs/artist/08af646f-49a0-453c-a14f-1d284f569157.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 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 0x1b1c74d665c0533fa1c2d5e48e494b04788e23f24419b944d90b201f3149bf5f. 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/ZAA6R1900364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0caecf7afe0cd687a7864685b3373a007f967ca446a63b882426219ec3b8ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAA6R1900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1c74d665c0533fa1c2d5e48e494b04788e23f24419b944d90b201f3149bf5f. 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/ZAA6R1900364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f1fc71e5227e79c1a77e8e4a38bd83764bbcadceacc9f9b95387be2e541739. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CAKSP1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0caecf7afe0cd687a7864685b3373a007f967ca446a63b882426219ec3b8ef. 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/ZAA6R1900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1777831ce0514928082c382fbc6b7bd440cd94b0bfb0b1d98cd97bd2efd0cc0. 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/ZAA6R1900366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7af9dd8e15a891e0d251860ed114a4b0b29e19c5102edf77b0bcc1ca42815b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZAA6R1900367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaef56ac6c651e55a939df3474cc979fd372178b7b5145398e2b42979167e674. 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/CAKSP1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e9c1492ab915a34259a9603cb184cbc77a442ad31ae859ff30666b10eeacdf. 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/CAKSP1900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fc217c2bd3cd15c954c32b977bf49a82394a550fd82c198071dcdf284a0481. 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/CAKSP1900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a9966e34caea6a482495e059750a9218af7634b4c2ca5ae97ab041c0efa033. 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/CAKSP1900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490569b45aeb809c34577913c1d7b1c6504dd0721473cf870686e8eeed7db0c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAKSP2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27b66fb593fa742d2d2c61eebdcbaec1b5f662968cac54a84756c954ae3c786. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAKSP2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fabcf4d39c7639825dea68be13bb4be5165d9c7da363b9d53cb16617f705668. 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/CAKSP2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08755c626796036ea74d3c787afe11a988886590fbe3b0a553a7cecb79539b2f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CAKSP2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec72c893ed9a17e05d36ddd3cd21b03ac2e89c5016468854d999f973ee56490. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ8A2423294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b2f0b060d2d8c72d4f0f13177b5d653266845e8310ba10367e1fe835e3ef1a. 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/CAM372400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a16b554bdb895ca23c1d0c991b3f16247fcea748034bdde95bfa5d7c50bdf91. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CAM372400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2358be12b6d5c74af1a9e0710a3f6d460befed632bcb84a48532d10906a96a10. 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/UKXN22409782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2ce17a7030b0307a67fb4a7bba6cb9b066dcd4a63e8f2b0c76ffc46bd456e3. 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/ZA56E2303104.