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 0x039696b5d008969da1b4e212543d502b54f14c7a078ae24001bc6e34bbb04eb7. 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/af58eb84-e33f-4e61-93ac-9b5f54721780.json and https://artists.proofprofile.net/proofs/artist/af58eb84-e33f-4e61-93ac-9b5f54721780.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 0xcd80e34df38472233cd36fb96b24735f57492232ed56871c7d752a576a5b4b00. 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/BXGR41700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f10323364260d5676042a1e44d7fb57519bdd41e4cc55e8459866cb3d7e3bd. 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/BXGR41700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f9c5b78b212a27a3e0e894cf6a1e2f4fc8e0259647dfb196257621fade544b. 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/BXGR41700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2982f45c55f4e30ee8624b96a7887e6d9b75490a86d2dcbdb1db1a5a16bbae. 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/BXGR41700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b32de690daf6292aa30898f3f0e50fbc70c709246562c9d4189c12f90954fc. 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/BXGR41700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cbf08da355f5aa78bac92d15fe92d00251202d1a0d55350752f42378fba610. 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/BXGR41700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f70552b2ae4e4829742e5163a76b30903f10fe2992c3cb8507b6bdd81d605e1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXGR41700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaee631c80bf270960251c42733f873e656269f82ca61796873e32ce6f39539. 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/BXGR41700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bb4c8554d34991a2e16f947fc31021271d20ff16bbb2c4f8b550cbd549db21. 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/BRR8V1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c43a5f5f6eb4a95ab0a1f8569db92e7f760081bd26677a2397298300865d4f4. 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/BRR8V1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f26f7d1f9b7a685a7dac7d6dc07050b4457ed0bbbb988d8d05113abdfd80501. 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/BRR8V1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff19730a22abeda0513ea28382cf5447dcf838d81508627ecedb00beee32198. 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/BRR8V1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bd4787184b38d81266d40a3a8bf6d197fd1f9e6b57e754ac3256920749f30a. 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/BRR8V1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a340d9ac272877fd3cc4b6191a59730a6406286c006a3edfee048c5991d0dcb. 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/BRR8V1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0edf0c8f8e0fa25d2a8943860afd4fae76035f947c3eeebb85e7a3931818ca. 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/BRR8V1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca28d5852f584abec04ec01606c60e6bfa64a9833d7c71e9f579c405a5c36bcc. 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/BRRV81500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69da47851009deb41c66206737af9704bb53023b87ba55c780b999ff442c2af6. 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/BRR8V1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f474a0c1252182ffd34e6a2d0191ed2fbb3f6b9cca6f24412b7184403968544. 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/BRR8V1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd7918aec8a97ea1db46614039de581f4fbdf4c630edb797d2d26c8721b86d5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ42047520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbce896df3e6131cc3f6a5f1506c2e864e1b81d748a32971e596f67ed2a3181. 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/BXVCQ1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b857067ef3347f8e8152b20bb11921de809eccf82cdfe776212ed752278459. 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/BXGR41800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb4638904413b21be1b19a1b49e786fcdc1ee6d1862a04537461ba813da066. 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/BXGR41600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871e4689630f852e09c5e9d65a6ecfbcc156a329106511bf4afd57f3116c4182. 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/BXGR41600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a38bee11e92675f5f2f80d806d53e7a5ddc001c7bda9d4fa3f076d24b84a5. 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/BXGR41600030.