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 0xffef4ceb95621aa754081ac9f9093d6281cf01632bed0383710cd7bf92654928. 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/78d1d7e0-f1a9-40d9-b5ce-69c93a855263.json and https://artists.proofprofile.net/proofs/artist/78d1d7e0-f1a9-40d9-b5ce-69c93a855263.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 0x0a5b0e5511852dbbb738c3d1b2af72e65b0e95bd8d850e229e51989f06924ae1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN31968475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf203f8ef781d653560e0899c5c297413a791cfc6509f32bc141e7c73d0dda7e1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZES52022626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739bccc3269960ada0deb3693f88ffcdedd447e16a1f1ae17ac68c72ec4b439c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES52022634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a51511bcc1954bbe5595db2b0c2f1d50c8d1ba0e3a16dcd299450f7ac12bfa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES52022641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18b743ac14845265aa639f5ca4cf89bfbf7e6b524f3177a18afb0d23f31fb57. 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/QZNWR2003933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bdec013ce5a821dea1332e30fd662d811e5dcdd56e631a1d066574260cde06. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWR2003943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d75bd3cd5db291d75e03e5489c250538e8ed02df11ee5521a762f2f9944628. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:23:12Z), 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/QZNWR2003947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8644b0b9a736897e0c38c36b07a7692c7fe7f17ca6c04485b2dfec4f14f560e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA72141338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee9bea3654dcc780b9c996b6d3906c76224483a8eac679e3830505829d8df6c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTGW2100615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff042c57247e752ad1d8a55275e938c745ba1e329267eb6a9283e4cac739f62b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTGW2100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd86b65fed1afe53e4ffe41a810640c6065343816ef0d7d4056e03b09f881c0e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHN32358251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646618bfa625efd22ae4094922083cf294bd1ab3c771b6cbf5dc9a96efa4e270. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6H2346667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d6cb92f7c1f4cc570f546c2180991ddd9268ff747df35ff11fc2fbe31fb00e. 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/QZES62537262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e7a9d3b010d39e58eee02250626834451ec1b5cbcba2fde77cacc288fe2a4e. 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/QZK6N2510551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c61b48cac4ea734d24275743fb5527949ea2e9ba9284ff09dba5cdafd4b0e3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFP2592125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c92eab7b2e43ff189317fdbc4676b2721af2d9c2ae3bf546698d678063453. 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/QZES62468157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32efc80e2017f7a35de8fe5cb0ff23b153416becdf08434140d5305cca9b550c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:21:58Z), 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/QZES62468155.
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 0x69afd7f22cc6cca75c23c3404a237632b192abee9e3829c35612eaa78ca1416a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZES62468160.