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 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 0xe3bfa2e6032d0d16133912e2567bfb315a4f0bb90ba04da3ca17ed1e91479027. 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/d23c06b0-be53-432c-a5ee-fe15e6f84fea.json and https://artists.proofprofile.net/proofs/artist/d23c06b0-be53-432c-a5ee-fe15e6f84fea.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 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 0x61b17dbffd75a1398a530b1fe543cf7ae4de4c3b2597cf1f0a9fb9495b2f64bd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IL1021911016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4004122e9ac27d0666975c975d3f390745f6ccac7a364ef8520b72bb72550935. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R1791593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7068a6e4fe33c65a3e49b9b3efda6f1ad3c45c327b83f507637a901a8f50c3d3. 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/FRX281723919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb46f733ae3c92de1118e4bf7ae2fd7c50bae3bf6f967321b2310b181c41edb7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR10S1858195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68611d0e3fe175fed0216e4654df28e84ab66554db69cbcac61b2841c9b3683b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL4431801229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf955cf33258b7aa6f6e3953cf9a4414d6c8d8245f1fc177eea1d7d4558dea53. 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/IL4431801371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8f89b5ba08ea2de6d0bf1b31021b4f8c4ba250af6bc58405748e44fec8cac2. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/IL1021910774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb1a4fc10cf1d11d66bdb0cecff7ee2d6cabb595dcd0ce8342f745d86655057. 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/IL1021910932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b17dbffd75a1398a530b1fe543cf7ae4de4c3b2597cf1f0a9fb9495b2f64bd. 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/IL1021911016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce6717572169da98e906aebc1e40237a532c36aee9edec3b711f35b2e582181. 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/IL1021911052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c629ddb579a80dc51918d7dda44f36e733677487303c5c85e94d8d674c2be6. 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/IL1021911053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706dfa6f67d4144621671822f848c275e7c9a00b966435e934747ba2613c3cd3. 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/IL1021911054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e2a752d408935f6e0ccc6f1e3a2d6ff88549b0737026036e1332f5ee4c7a39. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL1022011796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ebe33fb10b4259dffeeda5766b8a2c72110d758474d4c137785b9f8cb34853. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1012201550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13c301064151f7cd4d25445ef3cf2e91ddbc4f6c4f119e8cff637651d6c3e8b. 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/IL1012400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f7f9b8b762dec03091772a142045923c98b7c498e6095d480ffcbd0f14ca1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL7532413633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb8987569919296d82c5803f04fefd671c64e5fe1ccdd8e5b93a4190af07304. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/IL7532413634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9beeef117774c5eafc1546bb64edef036dadd1b547038b64c03ac0dc1aed82. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/IL7532413635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd64147d2443f2a785def2e8ff29fef02642f0af4ca05043018ae440d756ee3. 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/IL7532413636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264bfb53aa59b7e8c2570ccaea7141445e621f8901e9cbb16a2afdacdfdb5ca. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL1012500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf72bf0562b59c8fd803038badf7e3aa718c19c40f3e3e96754935289d34b3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IL1012500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10996e80ea5224db79c5eaeefda371aaca47173fbe5f7d096a1c68e75c58613a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/IL1012500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3be2e22cd0b9da7ffc399fb44528cbf29036e067eb2d093ad076f356796905d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/IL1012500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33469e893329f2df92144ba528202f4ff55b7ad3f797efd7589dfd4a86ce62fa. 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/IL1012500244.