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 0x41bd053d32f1d431c8b4f2c8cc43f1303019e31296b6444021e751ce6ce1c294. 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/fb74ebb7-6f97-4f3b-809c-16822b80f6a4.json and https://artists.proofprofile.net/proofs/artist/fb74ebb7-6f97-4f3b-809c-16822b80f6a4.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 0xab9d241c942d3d729d0225c5a91627b4293909feb3d557824f9d8392f59e742b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IDA401300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac1df8c9b78d36444390aa400196fa34940d2729e805ef10a7062e4f689f4a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/IDAB30616260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd217151d5e0b0583635936bde974d5e9d8c1ae1a455cf07c8bbc41c8abb958a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA401300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c48d5aa75df340f469d67a8410c6b0ec9c2ca75fc35ec72bcb864d85791868. 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/IDA401300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c694cfec11686b4826172ad3496e617087ba05dbc4f15572d521107ba28752. 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/IDA882022990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03100949b729c114a4f7d122687077e8fbb2c7223c1d203f4d8657753ca35ba. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/IDA882022992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da2ac6f5b158386631563735ca3f35bfab850320d7fe1d154260a1a1fc8bf90. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/IDAB30604165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6511138b7a867dbf0dacfd1bfbad37f000cc4a9cd747204e25b4207fddf3576. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/IDAB30604167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb970ef7701712948b397bad765df831d1c36b66d0b40c7ddebd1cc81b5ff7de1. 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/IDAB30604168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90617773b3b31ddb64e3414be2f4d41e75fc0cc63c4c39dec5f9db7c4c27a4fb. 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/IDAB30604169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ae5162aa58686dd61459f99fe5046f573b132f8c5d8b1ffc04bf26daf72b3. 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/IDAB30604170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723b097fac84d93e4a1cd0b3157578213a4ab8ccdda82dc70a3c8951cbbac24f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDAB30604171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d06e8696d03f13ff7e96e91315568c447c4ebc3cb76906aec1315b08b72078. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IDAB30604172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f28329f197d664efdef810b400c4d31821af00677ac57376c5a227123f01f37. 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/IDA401300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f74ff4c76faa2d35aa8f4946e427e82e2884437dd0851fdf5166c60d7d2649. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDAB30615091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0e25cf965c5962ad29508bdb1c4cf37b7797779826fa9ba44b9a9de7319e39. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IDAB30615095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc07e1c3ca05ca93a8f2e4a7f1ce4e2fe774d25d508b6e78be10b72bd02d8c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDAB30615097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4926cd8716e530250f5ae66022ccd03b263618ca4683008f0ea588cd2a5a18. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDAB30615098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537adaa9cb3bb07393cd227989fb3194be76c6663818cedd9c35108d069c33dc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/IDA401805048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd34318527866d9e940e88033af6d494b3b7fe3804a911e46ed4c24d47714f1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/IDA401300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa148a20fd436aac209a013b937dc68f4228613830943c7455923ea2768e84007. 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/IDAB30600097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701f5ac791d8b8f86c11565cf757c58e2b90ad0dbfba824928806cba7f7f2a5d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/IDA401300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc61698fcba17cff8db5cb239a4f0f160bc5e7b44ebf3bfbf004afd97aea82cb. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/IDAB30616265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3400556f47912977e590a6ffa624a560d14ef10308c7a686beb649e699c3c4. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/IDA401300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9fb6c835d2f0521426f55db037b966f7a7e930a12a202ed568cc0ff2a7051f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/IDA296170250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f28329f197d664efdef810b400c4d31821af00677ac57376c5a227123f01f37. 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/IDA401300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac1df8c9b78d36444390aa400196fa34940d2729e805ef10a7062e4f689f4a. 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/IDAB30616260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d83c763d3042465a0568598c1d413dcae186a5f2f55d4d5a0c567f0ad5ad830. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/IDAB30616262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9d241c942d3d729d0225c5a91627b4293909feb3d557824f9d8392f59e742b. 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/IDA401300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c48d5aa75df340f469d67a8410c6b0ec9c2ca75fc35ec72bcb864d85791868. 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/IDA401300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc61698fcba17cff8db5cb239a4f0f160bc5e7b44ebf3bfbf004afd97aea82cb. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/IDAB30616265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd34318527866d9e940e88033af6d494b3b7fe3804a911e46ed4c24d47714f1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/IDA401300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd217151d5e0b0583635936bde974d5e9d8c1ae1a455cf07c8bbc41c8abb958a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/IDA401300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f573169d2cb577d5919ed856e1c1a4d3800d6d95711932f4515e79beeb92fc8. 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/IDAB30616269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701f5ac791d8b8f86c11565cf757c58e2b90ad0dbfba824928806cba7f7f2a5d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/IDA401300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2957f670d2d85d991dee3fa06064f3d29a4cd2b57fade6366fbe10cab4e727. 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/IDAB30616272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb42d00bff07edf6eb9af11ccd962cb1b384bbd868d2cde1de0193ee15e17c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/IDA401300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadc3313b76e600a382b9532c3189be58e5e0208db2c5b4d436066b4c62d8fd9. 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/IDA401300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cf70681696da0a9039c21c5a1495246a7e56297f5e914b89b411d2578c940d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/IDA401402176.