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 0x9827b4ab0fae6984e11260bb7d592b3701a6731722e2c5550e435add3c14235a. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2f3d901-a822-4d08-b532-1205e5b7b8c9.json and https://artists.proofprofile.net/proofs/artist/a2f3d901-a822-4d08-b532-1205e5b7b8c9.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 0x63170b6e24c04867c12aafe29ecf9f4e495ee5e30158c28dc04d17b658e42e68. 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/HKG731764060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37eba8da48383d77480a78295dd8dcfc8529057258110d35dfae875f2421d0f. 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/HKG732124843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136d6875644790755d870920144ab1682d1a7912812871a5fa2f8edff4dabe40. 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/HKG732124847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b199c9f8afb21b3c80938ec620f6d716eabf84c27225892243ed8f2e3eb42d. 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/HKG732124857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b4b884870a0cfbcfa909af2e5387b97bf8e3858f7c135e30e46a52b074442. 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/HKG732124861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cc771a73a531f2c22d8224b207ddd157fb02214eab7bbafeaf4a9208618e34. 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/HKG732124867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d740f603a199f7651131d13bebb0dc6a2e72035d32cb868d872d581abc7a8. 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/HKG732281509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f30ded5442bf025482db7fffbcb4906795dba44be9a64100f4641ae84a4d5c. 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/HKG732281510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58683684d6edaa7ce21365a28bf91d7fd86f02f9b46034fe1627e8cc9f4bcb1. 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/HKG732281400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb2e16faa808739d3e95a63b017c1bf35584eae8609f73f74eeb4a8b36e07b. 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/HKG732281403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70317f4e12a8415fed25bff5f9ac6bdc197bf2719e96fc746717f262e95ea39. 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/HKG732281465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49424232f0c238e3524199b83584ce84eebfc213ffd5bd9ef8280eefa61798a. 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/HKG732281479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d81c1ce7284e32a862f6709b54ebd6fbc79a3f785e1dd377bca3737fe1f6e. 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/HKG732281481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e36e80081991ea4464a208411e9aaa911ac35408b74ca7fe66cb95d2de578b. 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/HKG732281441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0479f7f2d5bb9887557aa29edc06a6b1eef90ad3abf52dfbf543b5337d469b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG732281444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a15f78c1ee40d5a7db4637c759cf02564a69e44e49b7285e964a27454732e4. 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/HKG732281447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf579b49cd98a4f19a9dc2bc4e57b315495fcbeec5f74a2ab6759da71e43a40f5. 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/HKG732281206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c6b09d655e0a853f3cf4f3fd749f97da16cc04904f7e389f7628e652396492. 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/HKG732281207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caa075fd2ea37ae4d802bb1b6d0c3fb7f57ca4bbaa39aa6bb3819a63b09ecbf. 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/HKG732281208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2486005cd652407f68223f20cedf8c61d530c3e76f3ab05439f4d600ebaf04f. 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/HKG732281209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1d2ddbdbfe0dae5bcff5e192cdc7211398933bcf42e5c168e6e227cf9c0d43. 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/HKG732281212.