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 0xf7b972d46bec3e7ba14b62f6888bd951f6b33266486173c7aae8384bbf81487e. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0e9f1b2-0553-440d-af50-f34f89c3a459.json and https://artists.proofprofile.net/proofs/artist/f0e9f1b2-0553-440d-af50-f34f89c3a459.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 0x2ff14b2da94ba38b905630ab7b5c696750f1b9999fa61a4ad0edb06c824cdc9a. 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/TCAIH2425862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e09d0a3bb1508d6423ef4cf19cf11985417efc4dbef31cdf9ea70b7234479. 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/TCAGY2399503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf877c826564de4165c7c4001913902fbc2644b38b26ada118675f1b62988a1a. 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/TCAII2425937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0836685524a94def2743973911b7ea0f3816db2881f09e9e623e905445133fb. 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/TCAGT2350479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe782a2dd727c672910c704fb0e8701a4306584865818cc3c7f8321adcb39be8f. 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/TCAIH2425991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124ffa94bc1e8ef1dc40ae5c5d9d60beddb2db441eaeee3bc7dbd0811a8ab80f. 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/TCAGP2290210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7916aff17690349d1685a681bb5ef26de7d703c46404de613888124af9b9b0da. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:44:32Z), 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/TCAII2426056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6af7ab95a66a6b73080e312f50629163bb37201bcb21a2f698b18d5373a58f. 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/TCAIF2459411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d6088d97c4bf500cd8dd8e4b9b1b570020d6ee772721bada816ee25e24c220. 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/TCAII2426125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61cf8d0f7a92bd0af3ee7edaba9f300c28ad2d5c21cc344bd06ef16570b4e4a. 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/TCAIH2426135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda40b5c01ab6bb8532cc7095e47b29cc21110b2161aeb959bb8b6a99dba8b788. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHK2317609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6af7ab95a66a6b73080e312f50629163bb37201bcb21a2f698b18d5373a58f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAIF2459411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda40b5c01ab6bb8532cc7095e47b29cc21110b2161aeb959bb8b6a99dba8b788. 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/TCAHK2317609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e09d0a3bb1508d6423ef4cf19cf11985417efc4dbef31cdf9ea70b7234479. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAGY2399503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0836685524a94def2743973911b7ea0f3816db2881f09e9e623e905445133fb. 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/TCAGT2350479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124ffa94bc1e8ef1dc40ae5c5d9d60beddb2db441eaeee3bc7dbd0811a8ab80f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAGP2290210.