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 0xa13d18566b9e3fcacc5daa6511101a5ecd86e591a9a2f5849e19fbcf1a26777a. 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/24cf3d75-e676-4163-8eb3-848a251be589.json and https://artists.proofprofile.net/proofs/artist/24cf3d75-e676-4163-8eb3-848a251be589.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 0xa7284b5fbfbe67aa226f009d5dbd0cd6723e6c66d9db4ecb86e6dbf2c6a384c4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:51:27Z), 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/AUBEC2138624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b18aa81569ea5d5861af4cc79253462662a9cad141b6a5a381f41f0f3c542. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:03Z), 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/AUBEC2162651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59565de3b1e6a53e101c25061077e250c0f6fb592b701ed810f349247806bdde. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUBEC2151368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab23afde1e320faea06552038d999555d7f8ee24f6e2438c49bf813ed194606. 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/QZNWZ2214078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e17a269661567e2bdf1b3d4ca1521ab6fa6ba9ee32c865f2dcb8ef464f5d4d8. 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/QZFYZ2371751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e17a269661567e2bdf1b3d4ca1521ab6fa6ba9ee32c865f2dcb8ef464f5d4d8. 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/QZFYZ2371751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e6f9fc95f87b5c8f7a39822283b3142d14f39c8abdd5ef5a06e6693062528a. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZES72348730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7e126c63cb1952773c74facbef34a1555c24878d35e19c57830c7c071949c0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:28:01Z), 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/QZHN32329091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7e126c63cb1952773c74facbef34a1555c24878d35e19c57830c7c071949c0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN32329091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe181296f46e98f72fcb21f6c49f5fe82f7dc701f91694ffedb34ed4adc22a5c4. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6Q2336251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe181296f46e98f72fcb21f6c49f5fe82f7dc701f91694ffedb34ed4adc22a5c4. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6Q2336251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e9b2bdc8085e45b3772257f391bb8a6a49894555d8c23daa7ead3cca06af76. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTAS2336450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aa68a3270739ed6b9f302309149b457e6fc6aab5dba29bc565855b912eddfb. 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/QZTAX2204563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aa68a3270739ed6b9f302309149b457e6fc6aab5dba29bc565855b912eddfb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:02:08Z), 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/QZTAX2204563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55200c02548b908b5b0be326c9c34dd2092464b3b76d3b13aa90be0ae499bab. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTBD2398001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55200c02548b908b5b0be326c9c34dd2092464b3b76d3b13aa90be0ae499bab. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTBD2398001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c673f9e2f2628fcd6e9ec2e88743e41be0e734276a2feefb0a646edc4e3122d. 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/QZNWT2331953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a00e5c54e3e526df7e96e597fd4297aaaf77840098508853a540b5b0b090a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:54Z), 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/QZDA42471949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a00e5c54e3e526df7e96e597fd4297aaaf77840098508853a540b5b0b090a. 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/QZDA42471949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a7690b25f0ad7a9db38d14c017dcb466eef959916ef3f91c0fd58221ebc1bf. 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/QZES62462233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a7690b25f0ad7a9db38d14c017dcb466eef959916ef3f91c0fd58221ebc1bf. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:43:54Z), 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/QZES62462233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f08c2e8fd5d8e41d7c83b53f91ff8a239043d06667f1c2f8fe5844efca45a1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:27Z), 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/QZHNC2422563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f08c2e8fd5d8e41d7c83b53f91ff8a239043d06667f1c2f8fe5844efca45a1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHNC2422563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae552615a579867c3182adea58c058b8d0501776256694d093acc4135a91d023. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTBD2418777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d187062f0695b042e2c70c86ff67036ba06ced306a5c9f843befacfc4740f7b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFZ42522527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1abc824ebc7ab9831cb2a6faf0b84ca13ec1ae0c423f4d0576b8d34c625133. 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/QZWV32598924.