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 0x507b9b1dbb86d2d4af2ced737b09daeb0c30b81a04660102ea1f0be3032a7919. 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/7893c0bc-aa30-408e-a5d7-3fb6f4fe2655.json and https://artists.proofprofile.net/proofs/artist/7893c0bc-aa30-408e-a5d7-3fb6f4fe2655.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 0x81c016d163d3140a0e50f75eb3027b07092b693fe1254adaa1a05436239d2baf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKXN22485424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3cb0b01d0f3178f9a81b2b319b6e41d5b71af05613af7e8e66f2c9c5903808. 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/UKXN22485425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2455c0e7477de209e60c5c78ebbd1b2f8fa2afa42ac083e561a807556a422. 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/UKXN22485431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dad51593c10866b1882ee50c41954fa6523ec26081a4bf3f930ca5d5b2ad3b. 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/UKXN22485436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233d12bc6ad09d29ae0d0ab5f5b41d2fb0b274c5065a63d4dfac1adc4ab6f7fd. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/UKXN22485437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b1b6674b5bb087558649bad49fef50b3c862c755ddf1c5f0429d12db4f603f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKXN22485438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e35702613f745549911f50835bceb3e45f57548158c6ae56121ec83aac4f5d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKXN22485439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645da0b0b0e64084b98ce63a65647c51a820d10c9e820f0b5e4a571ecbee2e96. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:56:10Z), 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/UKXN22485440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315fb37c4ca9b0857ad5af0486ccd0d42ed3d9cf5e773daa6dce60c2977b435f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:27Z), 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/UKXN22485443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480859af705a36ef435e45e1713e0a6d748747a466ac5e493bc8dc4b6ed4a9d2. 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/UKXN22485444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e7fb67fc803250df6828483288c302ca9f081030e7d55e9fd4dc88a979378e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22485446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf9d00874b25cd4717d40512c845f75a98d32c895572e3a2e38ef86723332dd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKXN22485448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e7efcfc0b9ac5691c403d62900edc65f6df1c9e33ee5093451d2cc00d6a264. 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/UKXN22485449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6fb3d01b2bba968be656e496ed382e8de5efd176650debb530713b07f0311a. 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/UKXN22485453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6467710727fea1fae4e9318f5feab8a45d00430bcc2a76e99f2a64f5af7879. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:39Z), 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/UKXN22552564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb32b951ea690528d694f72cc4f8648378f77f40c2d7c670cb2a0728c204eb1. 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/UKXN22552574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792f0fa61659bbd18005464f248cc76f734e0494d33f01359300f9855bd18a08. 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/UKXN22552578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c58fdaa6709cd253a9725103099de376ecc0abdb05d4f4eae6dc80a7a29bafc. 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/UKXN22552580.