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 0x09b21587b3ffa80aef41fb3b134875eb1de227ec1a70019aafc234f200617671. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/150d500d-f8a3-413f-bfaa-23cd30bc163f.json and https://artists.proofprofile.net/proofs/artist/150d500d-f8a3-413f-bfaa-23cd30bc163f.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 0xc17136b0d2cc1e4af3d0604debd1082ba222ab521ec89b16adb377a05e5d83c1. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/ARBSV2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884f66f755dde4bffdb11989840c757846a9768c366146f63fe857d544a1c60. 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/ARBSV2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0407872f54bbe5cd5a7b86646be7eeb7631ca9205ee37e67caa67d645ed4de06. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ARBSV2100002.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d4326f717f39fa6a9704934728f264c627ae808dc45debe41a3541315f7a8b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARBSV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13395982d458706d128714c44234fad1685622e6dc07c3b75566f9be8f079755. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ARBSV2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906c52e7c7a681c072b11810310360a919b34f78272d2d669c9a6bfcdf5bcf2f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ARBSV2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eefe7bdf8a61000ad4c3da5c838fe47d9caf80adceb56c84995b879fb463fa. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARBSV2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c8c3955aeb69a56071663ccaae14e688ef59e1539ce7611f67c581158498b1. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/ARBSV2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0557d9968e84bf16dd1c4ebfb35ca514ee667643102bd9d23b12d873ca0dfb4. 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/ARD192300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4759541910999202f7f59a70bf0add960735eed1028b59d9520f8931e6f261. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ARBSV2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5895039818a3e91dda639ebadc4a5f04a6feebbd562e8e2a5739ef1fe7fbc0d. 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/ARBSV2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474e3fe30a758ab49edd075efaafcd2903fb4d35f93ab57a7d614f50eac62fa. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ARBSV2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899c0048568594fd12620308225aa1a02c528161a7176aca847526254415514a. 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/ARBSV2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a6c6baf2c4a6d4ca0a85c0e7f071ce394bfadafcb7b6995889dacc9d46bc79. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARBSV2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1a2b7cce4a7121144ee0725f1f53238104796c161f691ec2b6ee6371a2934f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ARBSV2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ca74350cefde1587ceeefd93bb6d8577e37a506de8278e750cb0e549ba27ae. 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/ARBSV2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ef8af2572b0da6d0dc50b95f85ac10c6dddfa08799d0e582d2aba470d6727. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARD192300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde95348f3445dc3a0b4a9aae0a583f2cd8e72bd7b67b77cef97f0211db0790c. 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/ARSXW2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981c1207aa5454f863211b86d0b967cfd45b7242614cc88c76c3137299551b01. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:12Z), 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/ARD192300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a197796e7867e61774b1d29155dd8266d2fd81920b1ac684852f5e7ce45b974. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ARD192300003.