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 0xf93fd95d7c799fbd4d9905b6b927cff8029ec957d91f1bc5af811337c82a56b9. 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/f07b4c4c-9d7c-4c4a-9ae5-64e66c91828b.json and https://artists.proofprofile.net/proofs/artist/f07b4c4c-9d7c-4c4a-9ae5-64e66c91828b.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 0x86f0f4cc89a61067d4b43d93b83d2f9d88963721894eda9d8070f9184208157b. 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/TCAFP2197986.
Cottonmouth (Rock Mix) (feat. Spencer Charnas of Ice Nine Kills)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e3a8c9fed0b5a317f499908a9abefa2cb1f003a4512d9206542e776c3bd0e2. 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/USYFZ2215401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f1176736f13fd31593a2a2bff8f0b1e1932bb0b67a180d282c93172c921ef3. 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/USYFZ2294001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5fce2fa3789dbc3654bd720f636b99edd1c50bc53e0a9a6c7148d1cc683584. 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/USYFZ2420401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9651f45ec1b51c9df74520cf3c360a28435ba1fe1929ec63ea91f3f61d86b4a. 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/USYFZ2413801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0891f1399607a8504875aa05fded5a487ad190aec1eccb9c9525f5ee683869. 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/USUYG1318719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63902123314e5b06b2af2612f8f003bb236ab7c26aac11a995fe74028a4b5c76. 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/USYFZ2423102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d46e0e5938507ed397e1ac0b9c4e19a1f7cbfcde29d6d39f3f973fc080307d7. 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/USYFZ2347501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d764ccc9cb6fe21284d982f38271250852ba1230625f30dccea2fd6e396c698. 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/USYFZ2423104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73ed11a3bde867477e85bc987ad4ddd2088eb852345854f7a75074ed67549ed. 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/USYFZ2402901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5fce2fa3789dbc3654bd720f636b99edd1c50bc53e0a9a6c7148d1cc683584. 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/USYFZ2420401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb40bc756e7da6b517b6d85edd86c774af097fd8658d5f30de047841e93d8fd. 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/USYFZ2423108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a5d93654d006fd6866bafb82705f4e75ea09e3f8a360b60d3e8c0782e64e47. 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/USYFZ2423109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6309604f00bc715c98256fcaa479bbc4fae49655efddf8f7a045179ecb4e17d8. 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/USYFZ2405103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d29b078332dc77a8e4fe99a3c1b147c42967d853aaf5e54dfd53e852b33cc8. 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/USYFZ2423111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9651f45ec1b51c9df74520cf3c360a28435ba1fe1929ec63ea91f3f61d86b4a. 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/USYFZ2413801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cbd55110d76516c43e6b78a7e846132cc556cb12d01a86b79b5c69e7afc10c. 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/USYFZ2405102.