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 0xd8d88aff3621458310abc0fe57784e6b023a80e3368586b682df8f82025d6c71. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bd2b227-6bfe-4c62-acd5-e4afc009a589.json and https://artists.proofprofile.net/proofs/artist/6bd2b227-6bfe-4c62-acd5-e4afc009a589.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 0x1ce3b59ac60b8bd5d7803b4928ea8a65637647a9b5d36aa133ed3840e44c45d8. 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/TCAFE2018397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2398a470ec6b693483a828daabefa7daf4e7e0ad906d6f195b9aca793e37b7e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:20Z), 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/TCAFO2198742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4119cd600e1663bb71ebabd6c8ae6054709e70c845235f5ab438632daca3c1c. 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/TCAFO2198898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e3f24d522b104eb3fd92005785b024673a60b57a2eb23b685779c7ec5c154f. 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/TCAGM2236111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ee853b148380071a5f3feacd0e0b4985e2b37c1470c94f51f34c19e4b2e3b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:08Z), 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/TCAHI2353727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d33505020249d08330720c509e5dc56ba62ff305e0b96c627f4c484526bfac. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAHQ2356475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698e22e1efe1b34e477fd0365a8c228f482c20cb745276e86dbdba2b7506f9e4. 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/TCAGA2226605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2fdee6144ceb2e65390af164fdc178235fa02d8f233a7998e37471e8f864c3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:43:04Z), 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/TCAIG2494935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46feb1f1f24e106c93d056fa297c8558a698766672995fbf459d1b452dc89776. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:01Z), 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/TCAGC2284797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cabc05ff5146d43b4c7804864764dde8226579d47101c3abee3b1e0a2f15282. 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/TCAHJ2388730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59cb87ecf1da1ac3dd09b83635bfee0a439d751e9a621385e8b97507c7287d1. 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/TCAHU2494808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace65ecdf1bd0511ab7fdb2906d9a19514e4e1c8e9e566c587a341fe982143be. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/TCAHS2393780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec3f4009c549a2cd9ebbeb7cc8fc45a6ee0cf4f58ef045c125c07ecc6cbebe5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIK2407939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6673b202260f8676f4705649fb88830ad5498bf4471b962ac0656a68ba3e16f3. 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/TCAIY2497089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade4c32c005db28cdbcf1910fac1a668cc607e1ac40295ffec75e537ca0a5b5a. 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/TCAJD2472245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf987f17894e7ec89badffbce8224eb5a3ea7adf0ae5020db49494c114db6845. 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/TCAJG2513735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c6a2b6cdfb433f7d8abd6322bfa56cd8f25a9e46ee0ff5b6354619a6915736. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJO2517477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aa9498ed84d0d62d3aa656d92fcd0d6ca88d7590ee9c9db3dfda2162414136. 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/QZWV32519741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce858bab5b5ea71b75b730a925dde435d2216a77cb746590e2f17cb242253d. 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/QZWV32553641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edfb84c47529f904f91a6fe7a52990851785661c71426b54fe666a2811638df. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:52:04Z), 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/QZZ8A2530192.