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 0xfdd727a1366c866bebfdf94a7378025d636185246240229ec1955ea74523bc85. 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/3af6ab64-1ed4-433a-a2ac-6e91125283fc.json and https://artists.proofprofile.net/proofs/artist/3af6ab64-1ed4-433a-a2ac-6e91125283fc.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 0xf078aeba704eec0f370951622a097e4335fea7943f3a3adb1dbab985733c302b. 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/ILTON2401194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e17fb3a1e78e673670deaa9e6bbf32061ab6831e746c1af9dd5313d40a24ca. 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/ILTON2401195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e1e2fbb83fe2bd3a5301b2e7605f20c57b28a33870cfe35f49e5983757da8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ILTON2401196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b4359b647110226a15bdfc1e076424e1e881ee05f53b8e6da6d95ae26bf465. 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/BKKNP2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5828c59703d296c6eadaf9fa2d7c9d82a5f7dff1c2216db297af95a468c55a73. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BKAP32400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2d279cd44308df4c4c74d23122ab3c1666db3a32dd482aea7507fcd97c6268. 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/BKAP32400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ae048b2816f053045962f4f65ca02838ed990b4095e75535f1894febc0d35c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BKAP32400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea6978ef27cb5ed6df8891bf5b02c1e6a0f0ce4200236134cd10b0eaa6d08cf. 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/BKAP32400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a464edc81fd225900015736b68b5c7f35db0e46977fb532d788933928d4a6b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BCSUV2500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d63b3c41c8717edabf0cbd15818f97d4079a763a4c812180116542909c670ff. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:51:08Z), 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/ILTON2502818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3228881452bb262af3da4d13c5415e5cfdf0b074eb74e477f8f9739780cca. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:49:51Z), 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/ILTON2502820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dd2ea2c031b65705cdadff871b9df0c9196cae724cc3730d902d14a22fd77e. 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/ILTON2502822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a0cd9fa6c9ded0814a7e25abc6f4b9c397431a01448c6bf56b25a710d52f3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ILTON2502824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a2cbab174d4c6330515f24a2679b4f8a2246112377134534ee55d52dead810. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKFGT2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f77431591762e586fe033f2ca9c7f1955c8ec4ecf66c672e3badb8a4836d55. 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/BXWOW2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f77431591762e586fe033f2ca9c7f1955c8ec4ecf66c672e3badb8a4836d55. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXWOW2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b8f94059bd4ebfbf907a22063a457a3ef21f2b402df8c262163502ecff24c3. 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/BX0PT2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b8f94059bd4ebfbf907a22063a457a3ef21f2b402df8c262163502ecff24c3. 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/BX0PT2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b8f94059bd4ebfbf907a22063a457a3ef21f2b402df8c262163502ecff24c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX0PT2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebd3ce69731d44b4a54c50bc407b69d9c04fa03fd9cd16250db7a96286cb9d2. 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/BK54L2400003.