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 0xcb0df150d3b719b063310018ce82dc636b49679418aa96ffd86ca02f499074a1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f941cc75-6320-411f-8db5-f1cba4809384.json and https://artists.proofprofile.net/proofs/artist/f941cc75-6320-411f-8db5-f1cba4809384.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 0xf0e9efa7baf9c328a55fb45555f213c89d41f355fe79158d8484a127550802ab. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:39:03Z), 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/ES75E2409672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d52f471174c8ec34ebc5b91c138fbcb94dd64631572670cb52980431884b3e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:06:12Z), 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/ES75E2409673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c98532127e77920dd7924811efdab17f3a420a8e41fbb2eb9bc58d958fe18f0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:41Z), 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/ES75E2409674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2f7ec62f8d1d0f8f838791073a3078e6586079f1bb44a4359cc1c6fdebb606. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES75E2409675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf17bd24390ec5613158e40ee97381b6746f806754acbaa291f4693c6ce32843. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES75E2409676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe4a94063f22fa27c6cc30f9327014954317f5ebbcc6f77f4985689322522c0. 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/ES75E2409678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc16af9fa5673e1bf46491ce6286389b87465539d7fac657310b9c256f854ced. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES75E2409682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ffe111dbdfbc4bcca1377320dd8fc9d8eb05bb33976d7c3297c80e2aae079. 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/ES75E2409685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cd1e63e19e0bdf38ca6b4b16fb18c91a679c65f4c704121d40e1ba73a9ca6f. 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/ES75E2409973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4df501e232ac5bfcd31772b8babcf259126fa5ce2f378131515d66da60e9f95. 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/ES75E2409974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e374488aaa8117e52c482616f2bd841f307111c09551c84efe0c53706e5d7f7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:00Z), 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/ES75E2409978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c29757cf3a65177a87b3a82620f418ba44b9d82a960166f61b8a9a8721e29f. 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/ES75E2409979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9564c391ebcef878dd2ba21f3c7d2b07440413c2eb19e9ab6ce71e7f808f8b39. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ES75E2409983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ebbff4e333e173686607c7fbc9bc98ce2dcf3e60f835b275e2d7ab1de77c0f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ES75E2409986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d3cf624588c00595d00c3e63151b6e78a809113d6eb463991fea86846d4304. 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/ES75E2410082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa93c9540d3d2b1c06142255c5999405ee50d0c41a491d9aa50a78a484388193. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ES75E2410083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c935133c57baf0e61a5bb5da44ff3048b328dff3792de0088794c0753543c72. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:24:15Z), 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/ES75E2410085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f2a81b2117abe192c58126bbff8c3beb54d23e7230b8142548962010cf485. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/ES75E2410091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0118a116f270cfbe8a2b1886ca73163b3538bc6c6706dcc37c1e4c8947caeb54. 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/ES75E2410092.