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 0x3e93ed45cd7df777b13aaab2cc5729d24835b50471031e8b618ab199db85065a. 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/e152becf-5d81-4928-9e4b-9f86c055e4df.json and https://artists.proofprofile.net/proofs/artist/e152becf-5d81-4928-9e4b-9f86c055e4df.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 0x6328572fda9078b0a2d96998f17d4a91a11408fe628bc49daecbde9e18838287. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DELJ81954207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23fb64e13c02d03a881fd7ad96c84e19983c3024736fa3fbd3a068acebc2d12. 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/DELJ81954209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63036690a3e3a7e9eb422292c154783613540f608df9e82f52efaa5c2a47287. 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/DELJ81954243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3889be66032faadf36ed73c78e9061fb30271e301003ed474d15f782c14ad3b. 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/DELJ81954208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b51ffb01016734bc4b5216c74525c011e9867ba03cb9bb16484d17991936bd9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DELJ81954211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa68b07c916b1a40bb1f4d35b21175308a1d2e8f5d406030ba4215638d6ed1e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DELJ81954213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e6a63666e6e4f330f4ccb9e33a4a8bcce342ee3726dd08a9a4214015265184. 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/DELJ81954244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9193561b58b833238250d307abff6af1080c2a33b4d1aa0e32bfc9e37611a83. 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/DELJ81954216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6254dc4e3587c90fec6ec732b02733445db4c2be44ce27a9f793d64e5b6af87. 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/DELJ81954217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fbc32a4a7230c714226f7df829fcb786e161defcfc31c72ecc0cb1dd6c26f5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DELJ81954210.
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 0x659ab3124830bd497647b066956d71e9fd4ed85dc7a5db2367507b1d227f4e56. 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/DELJ81954212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b947cf2badf48163c77936250744a97f8e899bbf80aae879408306625ff32. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DELJ81954215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c3e5469c53f1002b9b5f5e92531e02895861b46bc4ca39345cdb1b197abec8. 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/TR3911600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7909a70df0aef93d88927daad990dc2cc4c79d1748b67684e087100df641b47c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TR3911600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452ef35b7f53138ad54f36122f3196f874f92c3043013db7df8cdc7e5e1e5c2e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TR3911600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9863ecee24e2cbbd49f44410285f980a99bb4907d4fd55a138c25d6aa8e43528. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR3910600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8359d2ea337360b1c9c7f3282826413114e1fc98dbb795ee5084c27b215303f9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TR3910600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b333b50482773ee28afcb1a37766681c6b89b2051f844ec5ff157234af306. 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/DEZC62170160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ad7b2434f6e712585df73b457df494cf607dbeff50d870ce8c2f37ec386120. 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/DELJ82008720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef8161c5e57e1a7df73fc3ced2a7562ecc5de364deab32c0f8aeb64049d80a2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:14Z), 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/DELJ82008719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae0e4a781080d245063eca25a6f5bf5d7483ef66e1fa2389d1a58ce4f6249c3. 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/DELJ82079662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f35b2fa17baea3fd19aa0be7592673d5c76fa756dd500c2ae727ea3bc6109a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DELJ81963475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6616dabab3edab67a63e8072195935196ce69150cb2d0d2684adccc6bd1a2318. 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/ATR981146982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb1604f05691a686c2a608452a7268d15e4a3de2fe76e2521ccff3e96133461. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATR981146986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17fcdd8e40fd0aa02979f8e54b23c744eaa624515b17bd3cbcb10ef8d097f6b. 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/ATR981146989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ababdb6239257db4a67f4e35bf6717827f5d6775d6cf70a920d241740091cde. 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/ATR981146992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a03f3f8a9bfa144a27e6f8f5ff8272ac7f8e354409ce04f656581af730a3935. 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/ATR981146998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616b665b09fd1d898d3e1a716d81abd97f9ce59fbb7e373fade7aacfbc01933. 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/ATR981146999.