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 0x8a4f45b24ae6f778c81d167671c730c4bf77ed20aca000ad66be1788973d868a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeafd9ec-fe35-4647-8346-8780e48acaaa.json and https://artists.proofprofile.net/proofs/artist/aeafd9ec-fe35-4647-8346-8780e48acaaa.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 0x0fae43789b1e85461ae5042801218b8fc679aa1f563bdebc0dc6beb78c5032ce. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SEUM70601573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cb28b8192c5505e47e4e9f5f7204d0d866881af0e333c8359f98a458c3d8c6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEBFO7401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75211685833172617ef9089484e8a276e4b4763f7f8d5f16ed594385dc8d269a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:37Z), 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/SEBFO7401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6521c020128b7e95ad82c9a1fa5aff208c79baaba8d1134996248aa8e18be017. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEBFO7501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3211cf504c1f3f1ac9f39c99575214f492ec84fd3ebee961a2900e76cd8ffc10. 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/SEBFO7501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245b7259ed8160d3039299b93810ec686efa28e19cdeadc1757acee3e9eab1a3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:29:11Z), 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/SEBFO7501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121cc7fb52c8d89ecd6bfc8989ae930bc5de145568e790ab04d4fffd0d2fb30b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEBFO7501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786c3c0a73bdf8aea3fcdb49493a787775f7e890376fcc468437ee4ca48e2f9b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEBFO7602050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f1a5cd3fde21546f856b7983a289e13af3337aafba7b016ba89b808c15bfa2. 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/SEBFO7601060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c22ae507fa738d78d34489a532460c0dd3ac5b99cd889fa083d190626917c6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEBFO7802010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8eab4f8a90c9840f3da3f2d435ea6f5de43aa74a7beb100e148db9dded8b90. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:10Z), 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/SEBFO7802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf900143f51eb8d6b6b04243bbbac949063ca77c6d6ab9b78038276b01db8bac. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SEBFO7802100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23bc8c0abf4ac6b7bf28a11474800f6235dd7fb7d6b82f9fef894ccaa28533c. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/SEBFO9214020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761fa7f242133dfc5fac16366e3b68710a6ae2564b436be1839649967ff3f9e0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:57:04Z), 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/SEBFO9214030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5538472c042739029c8f3482c32678d3021406dc7f68e61e4d1339e87362cea9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SEBJA0505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8276c3f0974a1784dfe82b542c84f874d2675c5ae347f9c0e1d996ec544b74. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SEBJA0505020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73719ef8cf5a2527edb5003405ab8128d5bdc58888436595162c05c6c7660ff6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:44Z), 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/SEBJA0505050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d705153fd35f8f371567acb8c003fce0fa36442d31bc029fe1df8212f606aef. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SEBJA0505070.