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 0xbee0da1d268e5a067f5e0e7f4a6b9255bcf34fb39627e79720bda72f4e7c1ebd. 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/e4a533da-4ccc-4a49-b1c6-c4a10906e725.json and https://artists.proofprofile.net/proofs/artist/e4a533da-4ccc-4a49-b1c6-c4a10906e725.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 0x3cece3be859499b29f91e77545a5eec9303c31ee2b62d2f64db01549c866618a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/COAF42500970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b7845a34ce65ee75e7941af436cc3902566d252df4b1647f26bf9aec2901e0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/COAF42501171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33fa85bb7fba9b2feaa9920ab723530a6ab6e5e721de5529632a5906385c141. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/COAF42501166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90ee3326d06b662b9a33f2278c912b3d6285853eac71937d763db2ba8bd25f4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/COAF42501181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e50fdf2083287177230187484a41f682dfdbc752e40f8b90f96c997d270c80. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COAF42501186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cfac4c64522fc30352d69fefba040a310206a1c0f60cd7344427db34d652d8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/COAF42501376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a9a6ee05933c099d5f5ee45341f8af717c523778b86efa60a08a2a0175786a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/COAF42501396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d34933b64af145a223e44011384d657b7aa52ef85244f20a96d5b3e2a51be27. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COAF42501411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d51d72747ca2be29461ac5a0a65482ce0a20f6da8f06108e620ecfbc6655a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/COAF42501416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f788a34a64d3c47927fb78fe4a97f726736b36b7cae3651d7b3acdfe48ba804. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/COAF42501421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156c60c70a809f28702dc1e5a07d24b1d4c2d165448bd36138a4724b6b2875d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COAF42503953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd6003799459cd1ef053003a008013b9d633a0e01c06ac38ca4f62961d16edd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COAF42503963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a327d7fdce14d466fc57ed896825e483f7071868908448be41452e814b3d1eb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COAF42504013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5db6a8c2d1dbd94f34f66273ecb5ba96a3e8e83455a8e6043c04fb3a6129f1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/COAF42501676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b3ba1f726b144b9d2514acaf10205f7865ca9c81433251ce9b83997a38655b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/COAF42501409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8735ecf9ac02f76763abb2d2859bfe09bbe727518f674fa5613b02ddca6cefe. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/COAF42501398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9026a52d980f325d1a895e7b39e8941ce7c096c46ac8976357e9793f827723f3. 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/COAF42501560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1b20e4ba714c37e510be7dbc846a0ecf2031c7fdf0ce3fa759e93ba50ef925. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/COAF42501601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911389fcb88133a32d9f597a9b011e94b1bf4252df02572cf20db0ab44b46157. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/COAF42501930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1e271ec2f16d75bf1eaf613ae14b1329c901e3b23b40cae749c878f3cfe30f. 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/COAF42501636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde271ecfe5e54ca157645b1fc6516adc2ec6623389a4cc724408728433c3a65b. 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/COAF42502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f4549007b00528aeccf8cab95d6e396369de7d6e649d1b0e79c43739ea37a6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/COAF42502066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893d3a8d8975248fd81fcb7c2365463917be5562a443c1d590f667339949f23e. 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/COAF42504267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3b3da57e59e74d6896c6efb7e57967e61490f96351b21e13eac74e60c3302a. 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/COAF42504273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d8ac82b8c2a87c6c98a6a3503e5063fd932ecee66d76fad50f9b222facadd8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/COAF42502508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d4ccdfa975dab1eeba793bc43c938294d97882bd29af2b31126dece5e2d61d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/COAF42501883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4460dc2937c0f17a26074c5aab928b552dd958d2c70ae0850d2c55189094be. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/COAF42502956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72329c42fd23dae51fc877b32c1b799511f63284b46e0bd9db154dd672508a0. 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/COAF42502866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741cc3b970017867e0a46d0e883470f995dfb8564c395f5fbd6855ad7996251d. 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/COAF42503450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51d75c4b5f207ce625551bd1e6fe1dfd72f59780dde7cbb14fc08512cae72c0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/COAF42501426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43805b20b95e7d198993d288314ec9848c78785feb979dff444e0015c14d31a1. 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/COAF42502738.