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 0x8e9921d6feaf6daf189f4387eda619f762e23b69af4e0935cf163919e27796f4. 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/69ad737c-0c4e-4efc-a60a-948fbcdb88b6.json and https://artists.proofprofile.net/proofs/artist/69ad737c-0c4e-4efc-a60a-948fbcdb88b6.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 0xdb14fd82171240ab80ed3a38da2b10bd77c0f46a5a89bbc41540138fabd15e40. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAZ700701624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd529bf80d7239dc7bfcea2847a8240e1df550f629ea8dbd3e49476ecc5ee34de. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAZ700701625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62a6e34a1be9588aa382c78c140f0963b974ec3994c4ac0fd8c983cafbb13b3. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:24:30Z), 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/CAZ700701626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e67310243c32ad687cc89b67a8a4d4539817d5443e81df0dbfda653ab39c95. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:54:43Z), 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/CAZ700701627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96acf1661898a9570fde4cd1c30f4885e969c6631440e44dcb05e19dfb4129. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CAZ700701629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abcbedfa64f9a01c29d5fc596665c8d5712e32945c80e9ae543af721863c796. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:23Z), 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/CAZ700701630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afa7f3b726c15f61067da20cd85ddad456ed886ddf015f396a584a776a65f9d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CAZ700701631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5508de4689cc45cfee6998409d1ef9141254aa7ed8ccab8be3835b0834f80b2d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/CAZ700701632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d6e285dd345cf951cbbd6e8a854e5821bf24529570b3fcad8c52a22f8b4ee0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAZ700701633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0617d5d5d399c16513a03e3430b509863ca3fd16e2c8b682abffcbfc23fc19. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:27:08Z), 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/CAZ700701634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ac8f36192940f5786c3dba4bb10daf03251d1dc858f44c8ec3ef84244cf8f2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/CAZ700701635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27fe588342d3dc2375e9e275b0820445e51aabc7dd4f2dd45963870f2ab39ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAZ700701636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4a51ade46c45716c37c57f4c10d9ac59d5747b1ed5c6ce0ef6f76d1ed72e9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAZ700701637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23506d30ecbadb549aee6004708a547649da951d92b4f4db4404bc317e59f8fa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAZ700701612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4a2cf669041c4a2bda08460fba055e7b9a29f4d24824bf42dcf2b47f1e8224. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:20Z), 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/CAZ700701613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7391d71f45e0c41ee956341a732714493da4daebc8b0bbe2a1936a3f827f7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAZ700701621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f095de4ccadc6cb968f3fb6c0fe9cc5489e988a1afced6d47b28d0ce5022cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CA86Y2200074.