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 0x9114ba1c365fee9ff346b9d3c9b58e4bf29522a99f6337d482a3c4cd47a7b787. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3de176b5-4f84-4eb3-bf41-38a080fdeb22.json and https://artists.proofprofile.net/proofs/artist/3de176b5-4f84-4eb3-bf41-38a080fdeb22.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 0x45ff5ef62d54de68d714d4680ebbdecb1044ccebc6bdd57b284208beb1d2e6b4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL4721001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92afba49d93a8b74482ea8a30e31f1447c92f238c6a6f61ebf30a959b4142f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX281917853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84ea12dd9eb080f71d077e3147e96a47396c15248e37d34d165cfce78017c7b. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/IL7192000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8917c206225c0d3ed80384fa65a309103962e6f84fbf68d71f00a37e1a1fce. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/IL7192000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5686566ed4dcdf04bfcfe4abc6ee63a67c4017cb276957dce77c4d4176ea982. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1012200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c72dad2266fdf470919d4e43b28f92e98eb84c53a39dd7ec30c371fa68ed51. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IL1012201405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f18f1c7b35b83337d6674a237193c36f2db2e5aeb7c6e5dcd0dfa1e8a6b2483. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IL1012300850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529756f3d49fdd1cd95638216fc24ed9f24083489ce26071f81f5016b8afcf3e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IL1012301223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258d69f6744b26f2050504ad24d45e25606b424c67572f0a89ee81270fb4b50d. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/IL1012301138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043139fe7c58226cffb59560c102b281ea9d31beca94fd41dda119da869f25f3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/IL1012301224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca0d8aa18e6d20c9e5a48fa3933bdd4221a5ac89ad126f08f64f60e827694bd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IL1012301225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f18f1c7b35b83337d6674a237193c36f2db2e5aeb7c6e5dcd0dfa1e8a6b2483. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/IL1012300850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080e4d5bbe525fb0995632a9fa3934531bd7dabd0ad4f1926e5bdfab0359025d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IL1012301226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6ea796fef5ed2b62dee6b12cf45209fa1c3a2fd4485676dd874e65b9ed7541. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:29Z), 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/IL1012301227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6e179c6c57ff32a03a258007c9ce98e3f1d9157c86f109db9b383dbf0311e1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/IL1012301228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043139fe7c58226cffb59560c102b281ea9d31beca94fd41dda119da869f25f3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IL1012301224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fc11627c6ea5ae970cb0be9b003108ee195d6533014afdad1be94f0c96c7ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL1012400654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714021d287a084f8237915c73b19168383b01e493e11ece3c908d5b032e5c360. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:22Z), 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/IL1012401630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42537a633d3cd12e3d3cdd51ea4ba714ccb31606809df4c0f95ec1341193a532. 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/IL1012500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76ae8a0ff116ce3480e0e791a2338556e380ad9a7e6add6c8af02115e2d0222. 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/IL1012501025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983d7b45404e6146c11b0b11a5af085d2a2f6b358a38d0c9b7a769a0aecf627. 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/IL1012501027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3410cfae21ec793a351454168c3f20a514437d6c1c34902c6bf89472de52b56. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IL1012501024.
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 0xbe350bf8fc3b6945978014db54bd9a77bf3ba412d1d4f24d6a77e55ca6dadf8d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IL1012501026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732167af83826d0f99467fa7bf94b45ccc5bf47e15d73cbda0c0b5fb1a43be29. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/IL7532513862.