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 0xf9239d984d406d507272a41884d973bea623fcbb8286e6f7be1a9d945b87c20d. 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/fe86f803-5590-4159-95a8-8a8438f31493.json and https://artists.proofprofile.net/proofs/artist/fe86f803-5590-4159-95a8-8a8438f31493.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 0x536c4bc74e303c2e904d4c6fcf60ad9871b19a17b0000666debacfa0aeffd832. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:18:59Z), 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/HKD012375205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eaa4a8364d7c0b3f5d76999781e5a7a8d267577a2bdfb59f6a7a11c9d5528d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/HKD012375208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19726b849391ae801b0a201d51889bb203bbbfcc71e4585595715bbe32b84c38. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HKD012375301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccce4cb98418c77e6dc3b526541181b2ae834cbd978090a39c94dab395d081a5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:48Z), 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/HKD012375233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79a9c8e6d7087ffd5af5a6aa966b5a70e1d3581409dc86cda95df8f6b9654fe. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:36:18Z), 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/FR2X41995200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d5ab2ab87da140cbcff0ac7e049e6b0163a58c8e22f19efbeacd61ed9aa69. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:48:53Z), 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/FR2X41995203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7f55c4ae9c5105f1f8b9e13b8d5a19e6547c5a0990e618476445ca2e86bc3b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:49Z), 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/FR2X41995207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443b1925ec9a939ce7fbfe242d62a8043f85ff6dd9eab31413710ac757d2b3ea. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/FR2X41995184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b819fbd0f6e782d460e4661c47afafe881b82b72a6dab7acbb680165f19a51d. 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/FR2X41995193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e53ad4cf9cd3142755289e0018436dae5c74bf66c7dfb5fdc18d731bd8d51. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRX872019370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc634fd64861c281719c5cc155e1ec588c3a3850425e46c95df08da3edc229516. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HKD012376288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06881318a85d3a629ceab716b5109877f3714689c7f61fd0794b49709a2a89bd. 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/DGA052314521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89556e7b19b1a1e5a63ac305aaec5767e42e294b796579b183405c767f205d6e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:49:34Z), 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/DGA052314522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c43ce56a1b29223eb4a9ba6df4515b685eeb8a0337469e34ae88c9be8b30cb. 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/DGA052314524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad827ac1072f135daa1078acafc98a8acf6e376cbddb4efffd2e4c46c0bae30d. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DGA052314526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf44e4aaec0e8b97a0a4d465f61106f5a30781231d7f285f170bb5086c7ca584. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DGA052314520.
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 0x6e79d3f291bd007061e8fa1f0a30bd87a7263826953f06e4be8f98f6c42d0721. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA052314523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeef6a7697c6611bf46ecb14a51a32130c0764b45b34438c77d48df50b24f899. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DGA052314525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c558ec1b1901dde256d2c14e3ae4e1bec79bdad314397cd0ab704fac51a3ee5. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:41:15Z), 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/GXF9Q2531705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46cff65a6c618771fb5caa8c6a14bf9adcba9ccf0ec599d8fd144aad619a3f2. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GXF9Q2531706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f86701d46895947943d29a664c9b07a419df92b78251ab8d00e83fd64913d2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:57:53Z), 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/UKXN22577327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f11ef9962476c942e0e453d5804dccf292069bab94292de29eec0984507bb8f. 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/UKXN22577328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302212b3d5e6d59505954aeb5af05c0af61de092cc472b3d81d897d49dd93a46. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBMA22552121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910f232ddc1c6621f709f7836eb2feb55caf0de37d73c8046f359bc6c7f06004. 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/GBMA22552125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22089952456ff1e031042b88a64c53fd994746cbaf5e7ed07d65192cb5d78caf. 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/GBMA22552122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f9c8563cf44e6977e124e4b40d1f83b17c2c8a09b07eb0aa81aac9919889c2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBMA22552123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba4029c85250be8c8972cc685e90f96fa5976b5c9d4860549fca8a56c1f261c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMA22552124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910f232ddc1c6621f709f7836eb2feb55caf0de37d73c8046f359bc6c7f06004. 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/GBMA22552125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596f06f1880665ef23575c94ff706d14b021cea9cb9ec174c78e111e0648fc90. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INAE32502489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc26bcdf5902f4dc9dd797d86ea63f55edeb9602183a66bd3574e45d17d4e8b2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/INAE32502490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7c5dc178609e3b6ad8aba7f513f991212a22fc26d37bb58e9aa4b4ec2c6fe. 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/INAE32502491.