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 0xc85be19ec523aef7b8afc59268f9bb11df8be996e0a3bc4165bb9ab115cf383a. 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/13d596d5-e04c-4b83-8928-5a45a18b345c.json and https://artists.proofprofile.net/proofs/artist/13d596d5-e04c-4b83-8928-5a45a18b345c.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 0xd1ac6121bb45abbbfa5e6f2d615bb9f47e7a65953d1b1272c384beeb2521f029. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INSK92400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9bcb1652f24cb3e62f617879f64fdf3c7a86771a9c3abc93bcc0de3e2e1892. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/INF252300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbff7aa1e4216b7d1e43ec3f87e740a1c054ac631db34948441ed41a0a957e2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/INSK92300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0f52125372be7bfd7c926aaf3efa2fa532addb00434d3dbe4cd30585fa8e1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/INF252300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae66bcc384f69fc04001bef861316f6897eaf1c61f7859b38199738d60fe880a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/INF252300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783318a7d368a96f9fd219a66b493ecca1da5ccd87e689c31c167029770c6ab0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/INSK92400700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df4852d17d5b3251b0a9d219c68f9be6afbe5341e18e4487b785b896fd7fe3a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/INSK92400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7d881470874344ef6dfc8cd86ac93affbd5d130a5109fc1cbe786f341658ac. 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/QMDA62432832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55fa9371f5f7045b43075983f0d3fd04e2e5423c58582612ef95f74a290fce9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INSK92401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc6ff2ac3c64b127b01283510d8d4a9a854defb0f0b04f9e8d4284f8d453f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INSK92400643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a97a77facd8ec605d16d5236257f30f1979c1e888ac301c700a99e7384b91f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INSK92300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0998ffd8f7b438c2a2ba5ffbc6b9ecf0c18226cb66be1c1c9c030307a56aaa64. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX282411169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74260a5b444449aece79f4e3f95521fef38fa0112c816e413c72421186f03a30. 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/INSK92300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9340183569f0532783a3462c76665593799129ee0c7c1e6f254570e8d6c512ea. 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/INF252300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246c36cb4f502912ed79eb4d7db59afc43e24b94677b4620b8b7c6e1d578a7e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/INSK92400725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5623a129234451661714043557d2ae468433218ef3d57ae6e52e2a6e9aa4ba6. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/INSK92400681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f203f2fb5037e3f6ad3559004ff18a57a6ea37cb41c18b44136ea6936094e7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INSK92400499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f60bc0e5ae0d815ba3de4fe45ec38aa4c155fa47f0f08e799120d77682752d1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INSK92400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42677b40b7c818dc7fd7a5f91db5de83b5c423a43e6c348ad7ab82e52f659cd1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INSK92400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2dabc9841997557137e21d302e669574311b9ac25b456b677fb46f880cdd52. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/INSK92300181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdfc63f905c020138bb0cea3c786aecf4a47c7a5a65e5462f3921ed1b7ed1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INF252300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962a1d144c1f7b25310365f5255c64a0560a3de42d627a4867de1be0030ea43f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/INF252300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e51dbbbe5f2689c992d1c06425457608fb48979db5218e78def3615eda3d88. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DGA052438434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90681d3e40a7f4575f8b4ac222630b04cd29aa24d57c4ad458de2411a7884ce. 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/QZTBF2486152.