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 0x88146eaa4b43df10cd73e6a04ca70a0bfe0b8f85753a768c60d0ebcf5d4295d5. 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/0faffebb-a05a-467e-8e5c-b965216584c3.json and https://artists.proofprofile.net/proofs/artist/0faffebb-a05a-467e-8e5c-b965216584c3.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 0x16fc8a58057fb515969ba7373231a5da2634a33dfe48575376ced97e02c68964. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRB580900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd19c189866fd17a9a84a7fbb9e3c91b5bd578f96053b2cdca9a822b5063e81. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/BRB580900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3372927a31e73025ae1d4804bd4e15c1fb5b91a03016ae71f9dfdad8bb9ae59c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRB581300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36231a178e03a6f5197bc734a183659a223ae4194de16368c0cecee29d9b882. 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/BRB581000375.
Lucky in the Sky with Diamonds (Bossa Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b0dfd92b1b752e7e5758b29382c6e02f0dd839101be5118f7192173a7d0101. 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/BRB580800016.
I Want to Know What Love Is - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e255eb3627710aed286f83da0cc2bdce8e12b20c6b4453d9611a0f23063b5f. 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/BRB580900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde0b3a1cb98597a6730017e14051d69ac5f61fe0420223536db3d3b3e06f070. 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/BRB580900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18deb6805c28c99b11b6d32a7d54a2ef65c6593cec690671067f5cc0f616cf1. 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/BRB580900141.
Bossa Lounge Brasil, Vol. 3 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c83989f8ce6f82588d78783d8a30c07d05a00b60dbc16a5932b11d8255c8dc. 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/BRB580900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe649c634b1514136122e64a07d5174f30185a6983a34e4f2ee5a8596c8f578cf. 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/BRB581000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d75a51601e6a020bc57426c7d4b5513f641e83e85cb620c08145c142f62e80. 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/BRB580700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a36edd88948d765b92f18f5c7aecc2c49734c2772915a1bcc00dedf7d09952. 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/BRB580800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffc82df13d6cb9bf9a264d0b99ddf161b1465e716ba5627544e4356b4274d40. 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/BRB580900091.
Cafe Bossa Brazil Vol. 2: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b0dfd92b1b752e7e5758b29382c6e02f0dd839101be5118f7192173a7d0101. 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/BRB580800016.
Bossa Lounge Brasil, Vol. 10 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb1ed643b1982db5b19fe4080fd59d3c7dc66221f9d42fd9a773f849f162cb4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRB580700266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad11df0281f24c28680e78a522a58db89c3bba41af8a9cb71782fa4e8e3993d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRB580900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6706cf09c28ba25d3d85409bf55d258d409ee96161de363a7e9aa8cefe425157. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRB581000368.
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