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 0x19cc9c86760dcad12a7e250c59e6608c87dd5f975ad13ec53590ec1acb04650e. 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/037c776e-4e0c-47d0-9514-e1ac7af9b4b3.json and https://artists.proofprofile.net/proofs/artist/037c776e-4e0c-47d0-9514-e1ac7af9b4b3.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 0x075a6ba5d9d8137b5a5e9b8d16b3b530720b08dff2d37b70882b52a66e234158. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBKQU2412297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59af407839e3af678b3123426602bc43da6ea5d54b470784228f703c79ea7cde. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBKQU2412300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d85357efd88882e922af5dfdc9052d3ad5ed08643ebd9b9de74efe15f4483a6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6XX2555951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba5460ff0b539d1b9d99c5b93295c19030321eeb773c307e210e7266ea3e78a. 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/SE6XX2555952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f935d0b48d7812c9d264e180297372784d80b7a020cd3d061f6f1d742655b7. 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/SE6XX2555953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9834f6992528aa425b0b99690f756eaa7d87a12b0d3cc67ea4f1dbfbb433d12a. 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/SE6XX2555954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070e2800c65215dbfc7f883f87b311b0c2d589f41247a4537cb73ed9b900b54e. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/SE6XX2555955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b7e92b3686beaf7f40a323eaafa45bc03f6d0b287a7644a5c4d24160ab07b6. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/SE6XX2555956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1febb9fcca44af6b4153e32f22f1aaded666cf3de33ba0aef3a32f146c95cfa. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/SE6XX2555957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d84ba05bb1c613796308124801735263b9a62c1a647939d0cccd17a05a28a6b. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/SE6XX2555959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c9acbf3bb67a1cf906283b5af1bef41ff16266ee0362f27ef5c8beb4b6971. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SE6XX2555960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa527458bd753e1a319c10e387d8c8251b42ae7c7c32ea6afb561dda06beee0. 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/SE6XX2555961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4e5b923fe0c2b13ff7175885d846417ff7481a0c00b008d88f9da8acfca718. 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/SE6XX2555962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c91d70f1b7f36a0dd4155d31f0c00c9de3a6fe5c9054d0d5b1d5923a912373. 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/SE6XX2555963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e2d5b8cd231d540454082b7af76b220f2e06e764c583a45d8b626082457dd. 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/SE6XX2555964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946a236cafa80a71c95d6057aa65f92625e546a1d849ca48c1f563e28cfc18f9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6XX2555965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb99977e688af80f5da1410a7f5eec62b06528f40c6828f722d023070e3175e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE6XX2555966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222dded112b79f95bacbe75611db3f8a218cf3a51cc5aeb8abc86870bcb9d874. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SE6XX2555967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21718d6bdcf9164fa553b6a59c0798d383fcd9c259168c1960dfc44febfb3a82. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SE6XX2555968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7119070adde193b5c7a61e2c4baf061c6bda3f3d602ded036daab4cb67b07e44. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/SE6XX2555969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf058cbee03020fab6e10d5a8c5fbded734fe2f1e10b33d968dbb17feb2dae6e1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XX2555970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a3888155abdd4d76b0e03621675ee57108ed0b70f544c0333a53c1e4dc9e72. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/SE6XX2555971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a39591bf51671ce61385c9a41ccc34a351042947879ab457fab922b917ca84. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6XX2555972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fda8296cab7bb80a13a54192ab08a32b45fb22209d94858ef446f448da7a50. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/SE6XX2555973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8a14b2ad52e4cdc52967cd214d60e895d1822bfa969230e655e4f1e94591f7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/SE6XX2555974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5429a3a4bda0a58dabbaa71ee66465c13cd2661ae5f20a41c6b295e63041203. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/SE6XX2555975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c1dbaffc5c988c2ea9b7843d184c13f8305776f95fdf4888ae6d5d24384058. 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/SE6XX2555976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1215b8089e86a0c4ccfbbbbbeeb3b2306dc65c26c9646bbc1307940cbb3779d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE6XX2555977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54127699b65645900f152e6194ff9ac0ee525e751e97577290c0548fc7509743. 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/SE6XX2555978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa349abece66bef6bbd803c1d47e498770cd99408d9020318083008975381b66f. 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/SE6XX2555979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c0d9f5e0cba9df92fae0d4a299c577729fa7c3697d637f3aacbc8d7c12846b. 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/DEUD92509396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1859ed32b7cd624fe1509963ed799540c534671c4b4d038fb7d4fa861932fdff. 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/DEUD92509397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba346b3ac10568d74a0788678e487680f185105b00f75d7d28f29ba2cc2633. 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/DEUD92509398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba708f90b7c0f1317f680863046bef5e3f067f18ab7c8f98337bf32f8a799096. 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/DEUD92509399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e0ab3970b96f1f2a2178cb49642f07c1fc75d2ba335dd7e22972d777b63f4. 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/DEUD92509400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48aab4975e233842f3b67d7fbbe7d15a5a3239707aa4c8d80122e103eb5c4eb6. 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/DEUD92509401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3445fbb7d67b5039f80001eac9ac46ff7cdf44b0cfc3f51b4adaa768e53b1e4. 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/DEUD92509402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94af8abb7676903ca29c0da885c97141786fc04517f0bd2660ca22b6247e35d3. 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/DEUD92509403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0f0a02ed2c139627f5dca479b13045e6ab84865389057415b581e004c9fa2. 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/DEUD92509404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f3668ac185b1deb551ee6c701bc6b42fe06f15b8ffe390c3045b3f2b2fe8c. 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/DEUD92509405.