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 0x1d5639ece06a75b18cc14b9c2651275e53a49ba34a7ee4e0c729e70b708f41dd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e95ab2f0-f80a-4dc1-88c5-10a45901224e.json and https://artists.proofprofile.net/proofs/artist/e95ab2f0-f80a-4dc1-88c5-10a45901224e.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 0x50707bcd45b466ec129e2a22cb282b6d45da7de8b55497109c64d19b6176a72f. 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/ES5270300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef89241d51ecd44a1b15230b9373af02b0d9262ae2ffe6063dbe2dccfdb39e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5270300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5af2e7df73c2ec6f8bb56deec2d6394b6efc0d155ddf0b213dbc436554356e. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:55:54Z), 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/ES5270300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5574ddc242b02123978af1bdcde609c6a9e54d4bbcea074bce477f9efe75b1. 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/ES5270300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc82a4f4fa41ba0ba8b94de926baa1858108c1fd5ac89cf8c5093ad28df0511. 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/ES5270300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02c7af7022bb6f819bae24b9b8af56e1e835a46ab5afd8ef767264847775043. 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/ES5270300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888d21507cf74fd2da3b5caeb4c4994a28deaa13f79e1d438ea77d731c84276e. 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/ES5270300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6d9dea4e07d4cb28e297b057fbb1a9331517d784379740ad3db84354186ce5. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ES5270300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de700db9d2349346055aa73a21d2f5491b93316f3f7075b464ffc280b1c544b. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:21:05Z), 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/ES5270300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e1217e576c0c5936d9cfde2a7bc0d44ded587a91a5abc04eab48d9ef400dd2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES5270300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106db5c516c0310991c91ccea599905c83c385add9c92737839aa26d03ca12f. 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/ES5270300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5524a7e73b9b3431a96c487a123607b1bd22c3bcabf1fae358bc9903eed4663. 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/ES5270300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5710b858baa749037f024d7bb6f836d250f4e2e6c7c6ec9956390ce836ec3da5. 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/ES5270300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a705e58bf3d79a7f7f6cb15a24449a849a820e305912126b4d57fab1d0e71d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5270300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e2c9773199788d104af979fefaefd34388f8184b826908a373c8630cc9da0. 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/ES5270300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe907306c5842c5effc7bd119335de5c754f8bc10b4d56ea05c4537eb4d0f02e7. 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/ES5270300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514c7cf08e63f0e09845590b5a32725b79178ce03791585c8899b98fc08525c1. 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/ES5270300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca424cf155056be96249b4f7ab7e1130cb2c061a9e6600e4824f9cd9b78c702. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ES5270300224.
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 0x1c73dcc6d6e8beef6e0ec50ec10ba50028b835a58154c37b9462a81117b75496. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ES5270300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437a3129e71323d71543ee9a11635c3c25701ba0dd68434a2d05f38b862bc17d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5270300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee4ad6a370bf589730671a6e92aa2eed10d78ec739abebbb913590156071b6f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5270300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fce036179279e235d1f2b0184df167430a6e8f9d37621ee6a631e911dc7b44. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES5270300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff212fd00003634e83f7d41010a0f5544ef7f5e654203800d8da0415bce690e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ES5270300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b3d376cdb7f97eac5f958fb103c1c1e4059d2ec6da3036846037ba6c6b5f5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES5270300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda967022f0e9f1c288518dffb6df24ccd66a20d8486f731c1f166ae16173b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5270300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e7a452280be22278a93a9c36cbb306934d58d33b133b0a382fca3bd0eaf5c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES5270300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc4d8b52fa266dbb60091120d2c4546c9fd7aad9aa68f73979c386abc998603. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ES5270300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c7067596ba86d485c98506c38eec373a221b57214034b2fe7a05c0097d8d6f. 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/ES5270401906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f419ddc7bb19a08c22b33d66fc0bd68fa4768ec15f63610d3a960702693db5. 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/ES5270204612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1602018d8ce488bff229f58bf0407ff5ffac9c14ddf6275907e0a6e2e6c05a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES5270401922.