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 0x0abe18f4c62985c3b00cf651675117a52d32a3a835ac8ce6f38ad086057ed151. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a4baedb-8b1d-4efd-9f4e-958abe97de0b.json and https://artists.proofprofile.net/proofs/artist/9a4baedb-8b1d-4efd-9f4e-958abe97de0b.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 0x16ca2f8fd54e2a5544ffbce334dc1a6e39ad4500edd43d948ace181550ae40cd. 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/QMDA61871092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765e81e917be028a0ac10cf68e09b255dfafcf7b8ec60fd0a4e813e265bde35f. 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/QMDA61871093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ec16ae31896c2a7c7767b6fe1c74806ff0badc813f3a28135002b2ea94a2e. 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/QMDA61871094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9163d9fd79e4c318ccc5878e782f194b9155ffc15122233472e8a9b5964ae16a. 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/QMDA61871095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a0308f78646bc25c27a5a0d507abebc7018497ef976b9881341dfcc10c9133. 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/QMDA61871096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40c557d6fc05396d6bdf4176dbbfcdcad8d6f053a06d846f6135499e51d5a9a. 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/QMDA61871097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d37545d63815c1a5ac3fd1bf72ac1a6c1632b33d782061995d25c06f080e6c. 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/QMDA61871099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0c030f63a43e43544ef7849285aeb9d5c531925d557350e43c00cf9f0e919. 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/QMDA61871100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65461cfc3750bde2202ffb1fe068a3e51a3dd46ed0004eecc3857df2e6b05b97. 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/QMDA61871101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fe432d61e77598785a7b6c388a9600162dbf56c00a074a02cc3b18fb6b4573. 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/QMDA61871102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d96bf4ddbdc699e5291224f9aaaa5ad34560c925483ae6921a13379b0e30ac. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMDA61871098.
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 0x7bf8246e4bbd3956428da940e8d56572683480862dc5e08d0fdc58028e6e39a3. 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/ES7312100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182b022866fd5ac9fa011eac917fac232346fc205e021b65df59aa1833147948. 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/ES7312100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6da4fe1b1582409ebd2dfa6fbec501f3997acc8d144095931e4be757a8d8ce. 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/ES7312000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696022587fddc99cfda59f4a62736b58be898e544fe342b17d6ada41fa81a8f3. 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/ES7312100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27894d995c7337336238007de30ccb68a899104c85040c83df68352a61d6f1ab. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ES7312100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bd92757880c03e647b21faecc877a47a727396a89cf8aaea2fbf152399a9b4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ES7312100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fb65313f7f502c7fb990a487507a6c3d832cbb7a4529a87a1deabce6b52188. 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/ES7312100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41be4e42af123217b65ca8859f53264dfe0de97ed442ff2a3d0d96bf7fa36af1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ES7312100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8068425429cd4be56c8d91c4354bd9b34002d5caacb89d829dc593555870ea01. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES7312100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa22d63c0346a636cfe105fdabd18ca634c4c7abd11e8e52e5ff32e0ea66ae08. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES7312100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91c3060befa518b650b5ebc989d29262254c62412db79430827afff4592e61a. 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/ES50D2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018f2a2e4ff241e59ad9de92b9ae5b4e1fe17d9ce5c387dbdaeb5b311a27f75c. 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/ES62D2200029.