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 0xf9b52b7574c187ee510e5d170549c624f22d02744a1ec72cfc4c0b8fa8018711. 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/87bc3a41-2740-4aa6-878e-e01be7c8e90c.json and https://artists.proofprofile.net/proofs/artist/87bc3a41-2740-4aa6-878e-e01be7c8e90c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
100 National Anthems Around, of, and from the World
Usa National Anthem Star Spangled Banner
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 0xd66c8b9f6afe5fcdc484428c72f3a8efde3b4051ca736a3947d9ba57af37f6d6. 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/TCACO1630683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3940b75a241a8b02c88de898307dd6d7726bf747f948389b1b0a6d579e6980c0. 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/TCACO1630686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26733bc7b18fdefcf0822520ce35ac5fbc1aad6bf94fbb135f89870684a57dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACO1630928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae295977f17a2a235924e5311937bd871f30436c7c9c1c3d395ecc5fb1ef864e. 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/TCACO1630929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786d042fea81ea2cd9ed25f962f531c7792d1739b8df7eb835c7d428de9f711c. 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/TCACO1630930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7da5c47dde087d1a0fbc10df9a91a7495d78a2be2819a41fd4db524ee28749c. 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/TCACO1630931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bfae7734db9bba8259f91cc9eb4320a5dec291e64ce3a2b6a8e4c310be9d8a. 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/TCACO1630933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1d772a271e8cc2cdbc5ac4de4fd288cc36cd58dfe4077b0092e525a90d72e6. 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/TCACO1630941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bb3050c1dcd567489bff4a62d2b0ca7a91051a8d276757d63bba751f86de84. 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/TCACO1632529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e3b2b5513e2fc9d5e0a741156ed1d78516d6e453bda718459ba99614fa8df2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACO1630945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8690dd5f2f599432b5e483145cf26cd7fbcaf42fa8b5131cc57538fd7017d0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:08Z), 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/TCACO1630953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab2bdde3c6a91b9a8f358cae345240f9e5cec96ada3bae4566ad771c71b7542. 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/TCACO1630956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85655b33796948fd45ade437cec1f51d8b9e99fe64d76b8af94805c3b5dada8. 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/TCACO1630976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c931ab29f799b85f42f98332a1155eda30e38ad34c7133c235237f8b6d6e742. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCACO1630984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcc6fb7cc192099ff4fb22fbcf89d38af30e8635dfa56d89b0fae472c314393. 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/TCACO1630994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441edbd1b97d28b40d42e5a9c5a4efd4a4516180b399bc96ddd3456df200151. 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/TCACO1630996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e94f69ef31947655227d853c590808d788882658486e454e63dd2f5e0b1e56. 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/TCACO1632454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa92357af4d719ede5f17cea6e57349a5ba4e4ede1a79607b67839ac37ed6421. 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/TCACO1632456.
Stars And Stripes Forever (Live On The Ed Sullivan Show, September 18, 1955)
Anchors Aweigh (Live On The Ed Sullivan Show, September 18, 1955)