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 0xf8b43d8a09acdd02a42188c06eadbf0b819b63f8e96450aba363439230ec1508. 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/d38d62f5-8ce9-49bd-a3fa-ab5c1103735f.json and https://artists.proofprofile.net/proofs/artist/d38d62f5-8ce9-49bd-a3fa-ab5c1103735f.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 0x291d20b8ff8c61f3e900e65e0bca83ddac0d716ef1af4b15f54f6bcbea22631f. 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/BXG6R2400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0410da789ba9c43f9b29716382314b276b1568bacc126cea14302f638e2fc5. 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/QZW9M2424455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1cf7dcc0a20cb9e7ca73e3a36b39803a0a2dd8e4669bf200e6e8af8907269a. 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/BXG6R2400367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4081941e2a659f1269d0770e7fc689a6b6d06582c11013fe58f8cc2597d69eb. 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/BXG6R2100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72656dc9847eb894b51f11bfe4a50206fe3895f92b3d12e98b95f9572c7b74a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXG6R2100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fed7c8a29677856fb05be5ebb84024100531069284d0932e6ca31ed24470cd. 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/BXG6R2100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f7bc447d32693bc99577f753f2ba1b782aaf5ed8abfe2554279238226d9f0c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BXG6R2100509.
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 0x1ccf29ba3711c20c55d8b307e94e693cc8af4ce8d37e1ad62b5047b7882f10cc. 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/BXG6R2100507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a146a7a72bdf3c6b7d27b6ef77af7ae723633265bcf3dd7a1b844054363d00. 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/BXG6R2100511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e0041caa087ad87159831fca197d7b1c4043f1c764988310a50fbba24f2693. 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/BXG6R2100510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e14a5ba579c8d07b5e4e0b9fa16c0388e202ce450be7ae58256f7e40c2ccb. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BXG6R2100512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d72ba75a405e643cdb91cd4f4678202256276a13ba4546bf41874b075d76419. 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/BXG6R2100514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1901404aacb0af72e5eccb67e4e0a004472cf70f502b4c5f164840582edb4e8c. 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/BKVDE2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688f1c201d0e88d407edf466c07dbf102ce6df66db88bffc56948cf6f0779797. 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/BXYWW2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79329dcda5f8c83eb4667fa49621f7423452afe0f6bf0abcf6e04616ed617943. 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/BKP1M2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99eb1eea4e877ee3324a9f22c931f9495830db7d5a11cdb5eeb629fb8f3369b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKP1M2400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962000b702de686412c39187405526eb50a32b5fef2fd2913d59b47c2ff1e0a4. 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/BKP1M2400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca00090cf40d2a7ce0ceaacafb83a78389aabb9d90fd4f1ede709c92528fd96. 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/BRSVB2504278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3443cdd2c5c7316a1095cbc096c3a729303b6aefea1c7466574e0ff238eb8f5. 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/BK57H2500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf65fc6b486fb23f8f2c02946e0a5254b792224146c989d317264b8246b5b04. 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/BXG6R2401138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af27096cce509b948be2aad7b2712b3fc1f00e6c48e8297967e5b6f737074cb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BC7MM2400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd987df79ddf8018bd03bb3f8de06378e08da08490d4907757b9ecb2cbf4de1. 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/BKP1M2400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02799917ce43e999e6f73690d7aade88a73dc59362f84db122cc8ef2985a408e. 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/BXG6R2400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33d35b3cffeb42b1f22a19b9d8b36aa7c3a34becce8d25d164d06b9fe7e72ca. 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/BXG6R2400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1695dc4393ab300582428c08f1125dfd0557ef94fba6bd2497035d074fd373be. 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/BXG6R2400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea87b399d6ec2395f1f5226122c5cfd53c157d7cb7c28069546fb82790df50. 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/BXG6R2400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6619b6e69627fba13fbf2904222f0bb672a5e42ea2a5ce9f783519f5ed09c2e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXG6R2400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ecca50894c37905baa64b30fe355fd5bf1a115d4b7ce544a9edcd774e24c5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXG6R2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8908ac75a08f85ae6aec2f2d9b144f416346c29c4100af3d3d616e37a8db03c. 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/BK4442400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca1fde781aeccfab36fce21cf8c24066958092733b6a032888e9eb58b222814. 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/BXKG22201396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab0ba624ab1227c2d7fc13fc447f383855c883d553109d4f6256ac20bf4805a. 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/BXKG22200933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d28af6ec787000eaf4adfd7b6286bbf7672026036cff4902fdeeafc49f651c. 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/BX7P32200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda9500b144779874d39aaac43ae839e0cf4e8ba2b66576f7d491fc62d7dafcb. 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/BXG6R2200593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf822651b82c8d4788694277acae2f44cec219183d6911c8fb2bc513e4313e569. 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/BXG6R2400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94540f6afabb58b71fe296e6d0d12ffae536328b87ee7c88449ccdd842c88890. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/SE6XY2369077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c32705ab7e2c180cbdcb6b20fce0144d3c8ea784a51a157bba07a861f0c628. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXG6R2300623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f0f98e0bf2ba5f7e2e93aeb9601be1cd31671f23151cb7fec838ff3857bc42. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BKTC52400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772ce6b87606737064d71e9adf685b5200eb1018e84ce66cae120063e27f2a17. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BK4442300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbab3fb1650fcf10d705cffdd1d0484712ca72a0e023bec7d95f86a5d3c6d86. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXG6R2400489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5765f8df248f0542470f2dc54fd2b00dba113573ad7b68d9acb6566e9f15ff2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BKP1M2400136.