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 0x988fb40ab8775e37110ec2d069aa908bb20ac975f10897a45461cbd4b9c5fdad. 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/c2456a41-1025-4392-96b4-1ba9394ccd02.json and https://artists.proofprofile.net/proofs/artist/c2456a41-1025-4392-96b4-1ba9394ccd02.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 0xb3bcca878f6d2d6d63760840570073f843699303914880c0f77028f77f9c9a6d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:11:23Z), 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/QZES82490501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eb54d501b1a0f6b75c5af39ea05dd7db7f5cea2676a26a2cae02c98968c522. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWV2453996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8797d461772fc15d3f827af5d299c0398f67322885d34a91ba16d5ff4c94813f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWV2453997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf1eddf910aaefbcfdd7e7eaa4854bec4f8526580e46bf7856281f61adcb5e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWV2453998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf552613ae18962dd9a2d2f1458a9db6b68d954f7acc122297f8fdd0a749a27cc. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:30:25Z), 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/QZTB32451183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd326d155d92010fa2873e7da3d9c5113eca3b412c6d151b5b767c556aad5fb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:02Z), 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/QZTBB2420325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1663df72d18d99d9606ec4c382e675702c5ce7cb54c04150087e9cf3f2d3e9. 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/QZTBD2403406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd817c08c7e955055b1da3dd871a910040e794f805fa834ee0de250298e85ec. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTBF2450771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d17375e052e42b4770d05e25d3e0edc92f654f253d9dd1b50a204433c6c49. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZWFU2442332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a58efb3225f2286d752a319179c8c4db0ddfebe04d83b5e22543c26d09c503. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZZ772447599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0239d7c0587d7e7e9061c75dc1d9a7d37995b5a1f79fbcd624b3a99b6a0d6c99. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZZ782485484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c2a349f553b89cb71207dc4dcb5e4726b883d8e6edef91d526c8177116d662. 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/QZZ7W2498801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ad118d67203b00d286e63e73a0c8b170ca6b85c8d8732cd78509c9e34d476f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTPX2550042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77207052f8b74b43b0a97775d7fdc67ae9ec46205e46d38e6cbd9c7ffe0f8292. 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/QZES82570851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a96886778eff397ec6af412ddaa7127a368a016379d7e29aa75803fc60db957. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNJW2587734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fe4c489b5589a2e7a075df457ff330a3c5bee4f3b2a451c53c6441d0b5c8c. 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/QZNJX2574483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6821faa6e896cd90f9b01e3c9dee675a63448d8b28a639649bdef3cc57d1af. 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/QZNJX2575637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc24fb2e30910db3c0533ac81eeadfd0f3b7e6a90722062dcffc1286c88efdb5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTPX2588013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c03e98faf79e139829b8f3dc331ec56bcd3d111d60817facccbee7c4ae7512. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTVM2505202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53e6a46ad25cf391452d4a67674f13be3af1dc61e7816c13a192dbce5ecf71c. 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/QMDA72405031.