An anthem is a musical composition of celebration, usually used as a symbol for a distinct group, particularly the national anthems of countries. Originally, and in music theory and religious contexts
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 0xa2ff152c05615396af651ab7e3d51329e3b11a8dab9715ed8caef053eab172dd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e113c1fd-33cd-4b76-a37f-952e84c2c7e1.json and https://artists.proofprofile.net/proofs/artist/e113c1fd-33cd-4b76-a37f-952e84c2c7e1.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 0xa5bd5b4becf093b4d0b5457c4e051acc25beb1524fc5f86aeabb33fcd220ce73. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:18:59Z), 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/USCGJ2521283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42a8a64b430918c5200f8a4db76efe0af7a907a762e4a8bbaa2e814f0ecaf5b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:50Z), 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/USCGJ2521284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a54af06cf34185b83d5c13f8f4a849bf014b8d933d83bb8ff16f2996134d4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ2521285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73232a66f5cfa73c4409cb18866284d1229b38dfb49c2c9b94a9e71487c7d4ca. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:52:06Z), 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/USCGJ2521286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38a8cf20f79a7e856cd39d4c93bdd3a7a12229511e4af9a97ac8a174e3e55d. 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/USCGJ2521287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42457f01a949b9eff1f08a80176096959c320cef79fd6ff6f1cc11beb331f948. 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/USCGJ2521288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc804fafc525875bf2d6630515a5d104f42455eea6b64b8b7d0c0250bc5fb6a47. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGJ2521289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e534f43f710941c9bce934cbc1c31ef1e4aa4f7ad7414d05db3c7a3ecbe1b5a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ2521290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a9aa2f5a62f5f141bd3a29583e941dee4210b29e6f1482ddaa29ccfc21461a. 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/USCGJ2521291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12e9ad3c9d243c2d1bc9e9cb729111868dfa5442d9f8e98db205c5de3a9a3b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:32Z), 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/USCGJ2521292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece9f909be3f0fa80843b8f866009c443b32e5b8bbdecab959687fb2331d354c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USCGJ2521293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6824a6493fc34afa66fe252116a5f92f0d0c11a25fb9d78a6944b9660e587c. 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/USCGJ2521294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cc7ff613aafea5997cf39d8c54eecd746442e259fbf86f2a11837c3cc0957c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:10Z), 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/USCGJ2521295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e74ef658ef43397ceb415f46a29f1c704d4262b76941cf79d0e1f783e9a5d5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ2521296.