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 0xb6f36c720ed4e8c14ed06a943035c95e073801ea4ebcc53b2772a608e8a1d884. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9d090b9-b7e4-4a26-9f3f-c8f43e5aafb6.json and https://artists.proofprofile.net/proofs/artist/d9d090b9-b7e4-4a26-9f3f-c8f43e5aafb6.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 0xc56ac97db0da3c7f8639c6b5674f6c904269f509a4b4ca4ba943b5465c4cf179. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZNMX2435776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe991504a1d1f8facae104e896e391e5164b471b15f286172fb958613819925fa. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:23Z), 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/QZNMX2456701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ee8c98b20c9b58197608acea226d63cd967adc8305b2a4b36938504b1e932. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:49Z), 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/QZNMX2437850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f5b9907764cd01aed8ced5e25f6bcb7cb93b4c947d57ba32591313f5d6157. 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/QZNMX2437851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60def2d9161da680971edc303261f5625cd148e78a4bc7b9bb844135970b7183. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZNMX2437852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c23b7e3f975ede85988022997f16856eafa12d4b01205f1f6eb973191f7bbe. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:35Z), 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/QZNMX2437853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b208112d9ba031a56d01ee7d95bf7b1cdc65963ef131f04b79418dbec80565. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:28Z), 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/QZNMX2437854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f95c33fa0b92afd6c3c39920edc5aa6f6ba75130be24c20e8908beaa6d2e27. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNMX2437856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb8415c7ae2fb14c71188a991db06fc52b630c8ed8bd718c7f4eb87b114805. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNMX2437857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c73e4477461557758c7a0717c7081e900cb0e2c917bcc79fe8c6892d1acf7b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:28Z), 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/QZNMX2437858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54fe3bd901ee1ddc587c578a458ae01aebe56fe79c53788a06f7b37de3bda95. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNMX2468374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf032211e94c83079ead2c1ab1a0c97217ce394cebc1437daae52c74fe7a148. 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/QZNMY2452276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21cc667c2f31ca2d3b511e817fbb1913596be2fc029332278bcacf5a7387674. 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/QZNMZ2417671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a8737e006ab7fa41ea073d074a1453ce7a83d2b480721f9fcca8e4bb492612. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:46:09Z), 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/QZJG52588810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b5de7947f539c2ce724a4f407bc6d871930733ddb5abcc1c99f53e3a5296b9. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZJG52588811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c916676c2d8c696aa2fe91f47508e799647ede90d0fc183bde36db3f18b32d4. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZJG52588813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de72b1ee32e0ed48e439f560da54ccdaaa16d0b19b9c90e1b478a3ff39cf4a4. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZLL92597983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65759849f5b1a59ffb2c56bae62013c3ae9a343288f63854d1c493ff72af1461. 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/QZMEV2581887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614704ff9ff492c47123d8f4538ca7be452d73a3d5ea2422cbc050eb40fe28f6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNMY2580588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c5c7cd9a6e37eaacf0f798d6f14922ab9f39411b91bf6f0a8e203b0141a66f. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNMY2583881.