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 0xb304829cd1ae98eaaf7a0bbc5683a59df9007c9e4e93e2c05e09a144fed8ac18. 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/00482193-dc17-4f7e-aae0-310098cd2a84.json and https://artists.proofprofile.net/proofs/artist/00482193-dc17-4f7e-aae0-310098cd2a84.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 0x43e07bfbbf38bd8b5e840bec14f1ff6ad1b7e3b1446c4476f949040959ae925a. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/GBFG91200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4760614be0d76a5f58d70fb19820b0a36cbb562ca0557d8d429a2c9bbd78a68d. 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/GBFG91200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97720bd66aad27bac5260b972148eb084dfe5ad267c04886c23d3ef82ea29c7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAUM81700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63288e10ab66fb4463b9069e939d23ccc37ac1068fe5170e489eae4a65c547d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBUM91900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a23079ee038b5e36f616d5302f58a0344fed379f032fa72119c15750a5a817. 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/CA5KR2118245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609681200c179c36ec303221c0d531d91c0501621dc4b04853b8433faf043433. 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/CA5KR2118243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aad5766fdfdc34507548b35276bd578b6c636aad9140882e267a509bbed75f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBUM92100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab7b12bc7118cc6317427eec874a6557ee20184f98c7e08c084b22984049624. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZ5FN2399188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d274c11c4732773c686bddc8fdadca62234af9a13f1d1ba6d8249e5f557db29. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBWUL2357837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e6405e7392448a8a683a9fae59d3de645c8abdf34559fd5c4ead384f30bf9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBLV62301075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc24120848d3495103527803dd1e0ca8c22d6ace22ad9c88a3c1c4ad12d1c92b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBUM92500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ffeee4a74152e848bbd64b3e1ba7b898f66030caafaed38c2bd882b9786f1f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBUM92500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5371a2dcdf44abe93af8dd87b73f72dff528fff27602408658f8146c147fce64. 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/CAUM81700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc31844c4ee348610b9a06f3885b04a46b038a038fe8e69b5f4b8a00e14020e. 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/GBFG91512448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173825f883e7561623dfb48ffd8d10132459b59f7169c389ac30d82a4f5c83b9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBFG91200388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8378f9e83ea776c82729fecd451509d6bbafa550e35383f08242456c9fa141f2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBFG91512447.