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 0x9294951a4761863a4f1664d0fd2dc79b2932dd0e2eaa30108923b3f67605fbf9. 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/46a02567-0ee5-4308-88ea-947c525b5a3d.json and https://artists.proofprofile.net/proofs/artist/46a02567-0ee5-4308-88ea-947c525b5a3d.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 0xbbaa03163cc0103e8582ac8cdf307e0e2b64da214f8d9b2e888c501f3cc9a9fe. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/AUBEC2308958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9645c9d54fd2a9edefe53f31d588017f3991bf1000026ceb74c592b25c9d5f. 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/AUBEC2308957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79157229ddc9450c2b0414899f579a0ae17c19f14dce76d61803eaae04ba932. 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/AUBEC2308955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034297857a5fc3f53e473fd072276062cb3515e62fd3d4f3ff988123b2b3c510. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/AUBEC2308956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2c1bf5ef2781729328000ba7d650c1f606744c01adff10a9d5816dc5267cd3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUBEC2308959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30b48abb09ea551b184f84bab6f6599337cf09d69e2a340fc4d6b04a6e984cc. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/AUBEC2308954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33bc0ad0d273e4592e2d0603161f9807646850fe109649e6e14c76270ae63bf. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/AUBEC2308953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d769883c24f2ae5610151bf25b3f73bc9b0c04527f97d753def4d605a02f95. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUBEC2308952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41a8d8c2a0d45096e7076c3ff765860654d9e8ef010fe47e7ad001117e2fe1b. 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/AUBEC2308951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd22536238ce154716740ceab17270c05feb42755ad05074b913c05ef4911ad. 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/AUBEC2308950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a8d1578326947b3a7f2721e2e1c5b84680e9f66d7b9d13bb842cdd9b1eb8a9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/AUBEC2308960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29004b989e5bec71cc306ed3e583309bbc863a9c66de317a5bf670b436425aa. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/AUBEC2308949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3f2de3a72c91a138ce34c77d123eb152053808ad0da95e18eb0988fc813ef4. 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/AUBEC2308948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe778d1567097b3ffc21f570f9c07e8f806ab7a6882b736bb0e124ba0fbb0199. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/AUBEC2308947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6437cd4285fcc93a3834bb850296d5e8ae7b6d6c9a37227364f9ff247f4f12e1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/AUBEC2308946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2748c3dad277e217d6b717ef3601c78c55efe78d6ec32a202767591d25a79f0. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/AUBEC2308945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f21b3c6678523e1612c68b54e284c44f5e430088d187fee56071f7b52b6abf2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AUBEC2308944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a36f21734c4e0e0418cec85c2977d89f58647551c27d6a42a39b60b20100df9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AUBEC2308943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dd7c25ffea0b38a8712e4dc527508c139d483a2bb3283a9528636397f65e08. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/AUBEC2308939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5421820752af61affdaac5dc729cf3fa9165069c2f6bf5d56eb9d665446ed8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUBEC2308937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d7ebd49d5cc72f6e930bbb8750c5c58f027262d1219e9a891ba2c0e59d60e3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUBEC2308936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9b6c9234074d0f3a550fe3f1f0dcd7e97d6d98040fd7ad9638bee0932b98e5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUBEC2308933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59505760dd7071367ce62f68d78588ff9a7c2d9ff016ec4ff8842af3980b7a55. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/AUBEC2308926.