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 0xfaf9d61e96362183e16ade4b6b250ac63fd2d25d6209c24909847ca9bf4d92ce. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1f4437c-bf5f-42c3-9643-223c2bce6f1c.json and https://artists.proofprofile.net/proofs/artist/f1f4437c-bf5f-42c3-9643-223c2bce6f1c.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 0x33a4e1115d48d33898f764ea3e9cade478cabf85eba02208abd6606456020f1e. 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/HKG732005929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55ce4db407b32199d48b836fc8744ace5b4e77344dd58f1e038d197943d64e9. 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/HKG732005934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12070ef454736d0fdd961e832e0e63adb0a16cbd062ac927dd10526a62d7f652. 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/HKG732005942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539a434c77ae27ef2785c72f148ab950b11c3abc3ef0421fbb1eac5b4e7336a2. 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/HKG732005947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd1f08252439183021ff020a2eda7155e7165e79b0631c3a354591fa5410f15. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG732005948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce619cde3f5d96c4a160ad7d384205729ba0469188772370c1591d0ca18841d. 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/HKG732005930.
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 0x8b152a4139cb67096a72087de67959e7d484a39432dbbcd4cda6051d83e573b3. 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/TWU712001767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429624dd28e885f95fc48998958c09aa6c07a2aa2a7f0da83e4e3f602053f3e1. 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/TWU712001768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075c8b86c06a80b72472826fe7f5f2a3410bb73b5901e85b19b68ee90a273e91. 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/TWU712001771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5bfb5c03c02d6b67423c561b08810af7d36b61fad85aff685c1c986548e543. 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/HKG732005835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17625d650d009d9b19d13a99b85aa856bd60e89c598879f56df27acc4358e7d0. 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/HKG732005860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535175f5a9bd615818bc14235da1630f697c22fc4dd2c436c66f4ddc1297ea9. 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/HKG732005863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be8255e5b72bd2e9f7bf59d97b2334219e3b729e416561214dc8609a545d33e. 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/HKG732005865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e8651ddfa59c5291149736c74b7786fcebc97cd3ba92ef99c6ee2c75b0aad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732005866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22294d15032d2502b84c09d7c051aaeb6a389f2d230c19180cf8566a2d6da260. 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/HKG732005867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc013ab587f1ed2475be55abee9a8b05989307868b40b831f26a8a409b6a9300d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG732005838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15992daaca040cec6bd3554c7ca4f45ef8ba4fec0565e9e7e12492803ce03fe9. 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/HKG732005949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b9aa2d8920677fcb9abb00c684c1e6a10fa57c80a9339fccb93210d6d0bda8. 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/HKG732005951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503eb58ca15a5b71217c4cf0e35bb2d126a1359b9e49af28c4ef6b80104657a0. 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/HKG732005955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f66b3e141801a083518bf6db6f4c8a916d2ee28f8d0c43f7bd5891b3cc5fee. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732005956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261025a4676386bc73087582a1e73ba3a19f058cae5baba36f5a83d65ef7fcb. 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/HKG732005957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd767356e26e0a54d18e6a08ca3e90e1bd10a1c361e6cca5bc6f79e90e0bcca. 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/HKG732005959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1734ecc09318d4c2c839135bfeab5888d2b1c60b091216ba8d899a10867a37bf. 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/HKG732005913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b5032c57b000ad388950533ac28b8a4bfea72ed788f1d53a9d7ec1b32a20bb. 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/HKG732005826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb93ddb503ac976945a912d83cbac7811b287120c74aeb154b8ca19e21e97cb. 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/HKG732005828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd020546376ccd24d9e5a79269e65b9d56d86d791c9869f58c3324663094ba359. 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/HKG732005829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc0c92d83b5ac37fc9990fc0ad614a7fed69664a15f16d679f3111861baad28. 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/HKG732005830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58884a55b3ed99a83d41479c4e57ac84819b6de8fab643083f75f12e57415428. 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/HKG732005825.