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 0x4a68f68d4d32d9401e9cd5af0e8f0307ddad806558a83dc1c255e2d3e9926daf. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/366731e1-8509-4362-933a-9ff351212410.json and https://artists.proofprofile.net/proofs/artist/366731e1-8509-4362-933a-9ff351212410.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 0xbcc68de3012777352cac1e2fd40e7172c777243297668e6eba26bc9e48eee1e8. 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/GBCW31800273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10fad2ef65f238f7d6db45e2ed393cb17d5072581d91fab434624cc5ff376bb. 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/GBCW31800274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ac32d1ad15c23da8a43b0076f9f45234344a0ba2788805530a1673695920de. 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/GBCW31800276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c41c1a1e59e12fba78e4384eb3c2cbbb05022e513573c0773abbbf5961e7d7. 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/GBCW31800277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb730d4760e16c9d8a736d5207d77f8840d4710598e6a8564b673ffa935a739d. 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/GBCW31800278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a613a62912cdfc6247d6b37b7a68c0f8ca3076aab2434a8c9dbc8720c005c3d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBCW31800275.
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 0x8580dcbc8eee9e672bc227e6a163df312dd9d609114ecb59bb709fbddb897420. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBCW31800279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51d8ef96ebb60db86191c85ff57eae9f7ceee4b063e2766b9327c89ead8cd3. 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/GBCW31800280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad881560fa53b8fb5f54f75651ca369e323f53b70153d527bcee63ab340d775. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBCW31800281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c4d414087c0178d7d4273b6bffddc0f2438a4c2cb89e116c75a27281229c3a. 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/GBCW31800282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5fec99dc824a7344604b602a0b5e23d54fb2f98aab50868e03a8f5516afd83. 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/GBCW31800283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d9d961d530d94ff0841d072d47208eb2a2b464f002e291bd751e64cd9266c7. 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/USA2B1513846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5efeda0eaaca975a051972051fd6371d42339cffe43cf24b2691a3b940a58d1. 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/USA2B1513840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260ca08e6ce0d70edfd018ff2d071ac2df0e18775a460759d8157b5c2625b5ef. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USA2B1513841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa964b007cadb21fca162ea0c115061673d46e4126920752258e8a09ce7f4cfc5. 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/GBBTF1500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9f2a6eaf11ab1e393919698cd913943db91e3150780f46e99cf30cb2867edc. 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/GBCW31500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cf4ffd381a8a790e3133f459159d7c107db9987940dc3e973ec1dda99907e9. 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/GBCW31500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85314d0025b4b3ce21943af98feeacc255376238723121177881be14df3baa9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBCW31500162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dc2a2a68de59b6e450ff0103b3f7928951f2d0f7d1076445645f7f1291f58a. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBCW31500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bc429f8a459c0ba2ddc90c358bd9732ef478c0a530e864f94fadafb2547747. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBCW31500165.