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 0x9f8c78364a49918eb5523d615e6af6750eb1af24272a9cc784dcd0ba2ea0dbec. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81b6e55f-e015-4c39-9ac7-3e969266e82f.json and https://artists.proofprofile.net/proofs/artist/81b6e55f-e015-4c39-9ac7-3e969266e82f.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 0x4914f4524e3959741d94435b10ddbaa5b9ba26610b1d75c3e2b13c404cf9893a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH2077194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae1fdb2d8778cef2094661489c165d0eb47ec4c859869388b1381dc4a83d858. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZES81952780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c65ca29243331806cf62cd98d81ddadbbac912cc90d82af09fd88e40e1971ba. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2077199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7771b5c16531b939ff78c7002435033cb7152bf655ba4c9f3298d7a555c992c. 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/QZ8LD1951118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02085015caea0d7ab1c5f9a32948d5cdf8f0eb51f5665d935ff50fe0936eb369. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USCGH2077193.
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 0xabdfb22631aa5e76f660caf1c042c59d0e82ebbe8635eb67f1caa2a75bc35038. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCGH2077195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774098d7ac6573cd24dd406f0298edc4794ca07e13f19548c16bcccf00b85f4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCGH2077196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4be05959ca6012f1735515fce6a439eb63d063f26e4ff1b56ee610b07000f0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGH2077197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b81c47430b0816b6665b4fa60d47e48a59575668f16a3ed353e0ad6d56fafe4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USCGH2077198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3521c329ccdf75fdc7a6a593c4ff9b3b27e7aade8d31f5facbef5e894370b11. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USCGH2038835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835819b2977edb2049d18487e6e43c516152be2ab41a9edd6743a768790cf4d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282037014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2885be28860a895a629ed21637b3ffa6dba70562cb23ebe4f0a68dc25c1273f7. 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/FRX282037016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795df9ea9f9ac66f483022769564b3805e0beacf26fb9a8f7146b8b615660119. 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/FRX282037019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a6cf041f7d724e9d32c236ab6520a88089bcd7f75aa4d6358c45b6a389502f. 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/FRX282037020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ab568bdafad87ce2da4d7b332f6573e7dd7aa0e845d08ccb5628c3eb90d7cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282037021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e5dae4235daef0ce8c755ad4ff056c531a1fad66538c647d44cb0b4f4f62d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRIDO2112281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e5a23cc38e6bf0631dc5dd14e5d89be2f8fc6a7625608d7f167d37653e651e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:50:41Z), 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/FRIDO2112284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbd877f428f3daf3db391ab982adfc232da620ee107c24555446337c7042f25. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRIDO2112287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb93b0474e58d4815cebaa19492dd327f4763b08a0364c0eb14d52d76a21faa0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRIDO2112289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019a8f173ab58521abd21315014ca2d170026f4c4bcbabc24d6dce8da3d2075f. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FRX282037015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a62cae29e11baa045fecaaf4f0fffb3c30b5e25d14156f70a0a46ddb2783ac. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX282037017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3445c14baa0e92d2fd886022d2efc6b6499f07dd52f4b1e48d6cd269da73da6. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FRX282037018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b99941a08b8f3b8af26e9a57b4487614563bc15ed8b8fe16e7ab7311aef16. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRX282037022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8eee043fc4f0f5e10afa9841861f02b1d03ebacb87a269785a06f5adabf72f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX282037023.