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 0xa2ae9bce8ccbdff72aa7c8ada0f49f70c7e767a37edba33979979b74c82e435b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec9b26f0-b977-4ece-a61e-76fc0ccc74eb.json and https://artists.proofprofile.net/proofs/artist/ec9b26f0-b977-4ece-a61e-76fc0ccc74eb.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 0x7a6a8c61eab437ddcfb1fc8644d455cb245385eb16765a378b0cc268a0e6e333. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAT2185738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b4c32dd03d16a18e9c560623414de64ca28ca852df47a997c0c196a00f49a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6P2258626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ae6a4bcf1caee1dc75dbba230e83fe93c6be90485315f3179ec7fd4317dcb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6P2258627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199f6ae612dd0091e11e6da3a245d082b6b62f8e513b5537bf09941d0e124f57. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:12Z), 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/QZK6M2496763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71888481b2961e51c7194e9c5c2f1a5fbc18e594d39b8a14beab6bbe7bc2d5ad. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZTB62448534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948f9239a3ba6c9da2d51e9f57d66ba25175ebef628f88696c8ac4be0c327dc0. 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/QZWFG2495584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819f19338126d644edf856db49eadfa8c6b43a8eba5511057ac3ef45a7c3654b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ72514933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec460ee68835f741026fb493cbaa414e3a9abdd42a4d178f48ff9bbf9cd0a330. 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/QZFZ72514936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ec6096f62f1b8cf5232b15096b681f961da8851dad5b1e4b9f01f1e90201b9. 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/QZFZ72514937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af44d31e3193aa4248dbe1747b0ec169f01e28131d9646f98f910d519a9ee3e. 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/QZFZ72514939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86cdef2e83b74627c404e27bf397d3a4ca82f43b0bbe999ce2c6e1553b432c5. 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/QZFZ72514941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bed90aebd7d4e49d1254d233fbf1d027e904bf02d5f0b94f7164d092efe471f. 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/QZFZ72514943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a2cfba15b5cad83b860e83d7ea4d5da1604207f751544f3d95ce6c5b55d8a7. 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/QZFZ72514945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b156f9193b657de68af7dcd2f6de62b87eeb2f7b2f3e57e60a40df8a5dde5a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZFZ72514935.
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 0xe2d06f04251b30f1fef2760615ca2e3ffe29ee5be007e8e17324e1db81dc32a0. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZFZ72514931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1c1d51ddeb4cd9740f8154f14d41aaea0d91f6a571a2e9ba818226125ad8df. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZFZ72514932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650bd139e6dbc6961ef854d1cfb4b8204fee2af3ba9b0a71d104f0e298222567. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QT3EY2405922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f92d0df27524803d71abd845a825efaaf58ce1d95a66f30a615769e9fa55140. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZFZ72514934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a182d90d96f08bf8bb80007d9e799500d5fb86ea823dd17d77c4e99f6b80b. 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/QZFZ72514938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ea68e36295fa1e2da8e5f91334e4fd5d28377f7262150b990f59efafa1cb54. 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/QZFZ72514940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982ff06212ef29604ab71cecf03da3afa102fccdeb51d6b5aab4da323506b0c1. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZFZ72514942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c69d5106b1f9b1149d6668ccee6b9c6b0362523957f442962f3603bf04667a. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QZFZ72514944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e70514adcc442d9e469911116db38ec589f30a13d3cb4879eb1ee8b94a6fe8a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZFZ72514946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9586cdf0282328de836256c64a89e4f6f5e28deddb336bf5481e46cf8a1faec8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6F2570801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747c787af6a0a5326109250151ea860d9bfce95a3212ac0f674e3d02909628ae. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZRP42516018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd5f1802e1dc85f91ed46a23060ffbc7baf956aa9717b90e3ea6bd064c8dac2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7Q2502592.