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 0x469232d9c1773f1e6b5cc30a34213d5f9f4ac35913e0b0f4cd7361e9d3d5b897. 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/89079dfe-2a1d-4e70-92bd-e7c93059cfde.json and https://artists.proofprofile.net/proofs/artist/89079dfe-2a1d-4e70-92bd-e7c93059cfde.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 0x250390f194855cc1ff143dab865bbb77c39b3a031801883814031e2e4d0694b8. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/IL1041801961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb426716317c91e59b4636b6da5bf1a969ea6b8c0b9a685d74d9d70e33192514a. 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/IL1041902402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35803243ab395f3c54e466a42d92b7f40bf6cdd2c470d1fe425f1ab29c3e810. 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/IL1041902404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237a899b49094b66fa6b7cd402a59ff05dec2343386b2cb8aecacdaa6c0ed406. 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/IL1042001961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0621cb652a09d7470770ec76417a44eba21608a77fd9dd1e78479734a777e59c. 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/IL1042002007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c376651cf5d3b5cd3c439cfeee5dbb9f7e2931d1e5e82c3afff0d4c91fa3338. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/IL1042002151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f3df7f731540c2c030f287a6817c9f010b9c807e22f6e0b688c14073deddc4. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/IL1042002241.
דגנרט במקלט: ההקלטות הביתיות של יובל מנדלסון
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0dbc53beb2679ec82bb379d626e8f959d2c8bc0c8125a0928c3d5f5302e2b7. 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/IL1042504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34c63f135358ef1bb9d6a159ca3a793fd53a07846bd6a4fd87c0ec390cdf717. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IL1042504002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5394183d526d32003d7386054ab23950e2576a15ed57c2ecefd2608423140c. 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/IL1042504004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab470a60f66297428cdd031c7beed9bf18ef57d83e18103d91cca294f4211669. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/IL1042504006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a1a1a54a34d8020091fd72ae57e3c4daa91b6f5b18b9107663868a836ba00. 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/IL1042504007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891ef7ea9121a74b05780b1d5710758c92704ab349f235574f1342d92cf9f42. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IL1042504008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbdbe81c47d774dab5fc0d296f78fe55d93f63541e46424acada1db20d242db. 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/IL1042504009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d1c2d39aa4b8f5f589ea0dc74544adea0e00c983c90c786f286926436e49aa. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/IL1042504010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bd1f27dce5f9a9f1e76423d09999c3472559dc0092dd7d7d468b2f37d7e7ad. 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/IL1042002502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9c5b5241ce59dac3d828b538328a8a420a37666a70ed497b7b87c9cab7c579. 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/IL1042002514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a6d4bc75cc15dc954eb752cf59a2161437387351c5f1c59b123ea4f9bf6a89. 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/IL1042002503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709736f4b49d8d94c2c6950e30db9ae40924ec7d8c1a20aa9de8473020ba8745. 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/IL1042002504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704ff696f57dddec653c9593fe34625bd97482318cffc1441936b9a1cc6f7c7e. 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/IL1042002507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e3d949cf27329ff2f749e8c39874e4f50ce94a9797e6724b931a1914911bbb. 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/IL1042002510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dfcc4f42466dc7be203306b1dbf6e69ba4d8683f8f65dc93577da2c0e7a021. 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/IL1042002509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c6add5f021e5346702c30f23d1f5d25246e1270d8e0899b5f59e975094d8b4. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/IL1042002501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff548ea93172b93c56c288a8a37c1ff4cd47b0593fda5384d43b7056f70a9a8. 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/IL1042002506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5ce522593ec0783e93ade61299374f6610ad60703d3f6fe7c7485cb28ec4e. 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/IL1042002511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f8d3ae9939d730c3f0aecbba08f83533e7dda5d19d21f64dcb5c6bf60d88bf. 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/IL1042002508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9fc6afb7a83df60fbcfbc6f50a5a4c0b7d19acffdf5a38f24ed1ea4c93c214. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/IL1042002512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449713ba1b6a88bdd5b16905cdb6f885d01013f24ba0a708445b2302349c3104. 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/IL1042002513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff7a400c11adf4090f35710add8798550b43e601477d903935308ab43f3f0cc. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/IL1042006211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bd1f27dce5f9a9f1e76423d09999c3472559dc0092dd7d7d468b2f37d7e7ad. 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/IL1042002502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dbae441ab0299ed4a3a11cd95c02bdc0c5717f842a23da301cb2eb4b1a7b4b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/IL4191002097.