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 0xf941e4a853aa504b2c31a23344478e91ee0e7922c34ee0e46a538cd070b2832b. 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/14808993-e416-4f0b-8d66-5666ea87e3fb.json and https://artists.proofprofile.net/proofs/artist/14808993-e416-4f0b-8d66-5666ea87e3fb.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 0x9ec0b31934740fcc98491c734655aaefb0eb68271f5e554c7359f57fbec39df3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/COC011309322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf05e3476f73aec710b4019db0266a54b41e48d3149e71e083617d6c4227f379. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/COC011309323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb946034f2e67f7e8413e3bf12606c96fb2db39335363dbb0da0ff61de42e53. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/COC011309325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b018b31e83a52c3de42e944196879856634b3340f36706c01b16a0bb121742. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/COC011309321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cb0f4f852c6c83e6563a6aca5c534d9d576cd9c13d5a42e91d30065736a238. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:37Z), 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/COC011309328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182582b865d9679cf00a4eb339f2d624acf08327f6ea0ab82fcd67935ca5cd3f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/COC011309330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42dfefbe55068a36c4f4122f53e6848a989a9c7811bbca859050641674a90a8. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:17:39Z), 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/COC011309332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072b749a3afcb02503d3e949d9d76bb7c01b4ce22864a453ce44d432be7bf6ca. 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/COC011309343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46abea227030e01b38926182049def71c87ba0093f1d78b5b700e8b23ee0eb. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/COC011309340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6cb8c7006813849c38cb254e21cdf4130e4facc888c1e0c9a4cca4d91cce0c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/COC011309350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f7db324485d5e4b39ba0156ecc2236b7d8d369a70cddc16bf2451c18f9550e. 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/COC011309364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aadb4451cc198b50bb0fc960a42a018f3264949ded09a46e3bd2ab457b411f6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:41Z), 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/COC011933111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684973004f9a3d18212bdfe0988e893473ffe2405fa8d1884f45f39a90213e4d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/COC011933113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943889dcf82585905fdf45bbb09f5c320ef0b1b96522a571929e78807d8e4204. 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/COC011308919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604f08f9a654186e04b93df4948064566c348e9a20a9b5979d0487ad417a0c5b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/COC011308926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b52527b80bdce3b7c51721c9756bb037d355d7c172539aaf3844e912c048c2b. 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/COC011308928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2644c2dc97ad2e7ab7a488516fa6d4e21ad6e3bf187941981b5b9ffcebb438f2. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/COC011309348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e07a5d88c2cc06492429e9b8ddafa6bd1944511fa0d964c4f50be5b9ced08a0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/COC011308933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73d720bfb253e29f2aac3acbeda9b914517fc329b6d8f4149b0cba7eae243ad. 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/COC011308921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d7c487cbb5f8adf9f132dd197cb90f757480468340484fed6d483c6c0b8ada. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/COC011308946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9de81ea898075448450b007f9751c7012ddfbf940d00e29286d83da07c70b4. 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/COC011308935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08768ba94cb20788d9dafb22204cc38c7e2972bff75ed092bd518483b88cd14. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/COC011306305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f4ce7ad4042353830fceab726add2aab3fcfe6a741a96b3beeaaab93f90f28. 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/COC011329244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc659875da00ea0d74ec60ddb791f50e31d7e00839d89ef3ed52c699f01601a87. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:25Z), 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/COC011329246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa04228844a9a979f4bc8f118a176f4f0d8a8bd47373fafe3a48985ee8fa3e43. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/COC011933134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26aec8851d711712e10ac1517335b979a1257a39faca6cef67901c095ce9ea2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/COC011933412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6ffb3b483a103999f8499c15575f22df8753d6f2d36244fb93751fe5d6d9ac. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/COC012033774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f5ad9a31cbf2df8591d72ab615d46f033a0fe1f528a85cc1d6850cb82457b. 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/COC012134327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa9ba55e6014974b0a33e2c372886e164a207884349941acd675ff1a97222d1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/COC012134393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0354da8663951850fe48753661902f57555c6c8ca40fcf9ae42dd29bdec19b1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/COC012134394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3ee23faa39d7ad30e0569e265287e72348567bf5d67862362160b38cf58387. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/COC012134395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616ea6ee4bfeb7ab6131a785b2c5846673b3ea2bc2d400c50881e494dd4a012a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/COC012134406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1033cbd450e08e6a4ed2006942cc0993196f92474ccc37413f38fdeba18595f9. 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/COC012439500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c82c92af8ebdfc7c16eb3ef8dc35620bc95e865f8a2a9b0ad4b366ae37a658. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/COC012439864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cce924793223cad7a1608dbe22a30de8c1df61bcc2199273516e51bfb18197. 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/COC012439866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc8d5b64cab8f14fef1818e043067a1181d3290f903a25d11f40b4f824556b9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/COC012439867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370c7cc581401c5bfda90c3594baa43fc8a4e70270bbd656d1e9d23f82f8e73e. 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/COC012439868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b15c2b0e07f1b92a4bdfb0ca109ab2b60b9c38c34db029eda69def8a7d8a474. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/COC012439869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b23e67034897acea7c93ec352acb50d3f6e01308188f58f084a19c287624f44. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/COC012338915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60dca0c4425d41566e8952a19acd48ec58e445173bf44ee3954afa7df55dfe2. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:26:07Z), 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/COC012439880.
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