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 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 0x97d7f44094a7de5c6ef802bc87438d16990dcb0a8a6e68cdb97b67c61211c01b. 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/c58a5292-8191-44f0-8868-bcea041cdc52.json and https://artists.proofprofile.net/proofs/artist/c58a5292-8191-44f0-8868-bcea041cdc52.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 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 0x2ee80f7844d98fd0b9db35804b27dbd887825e2fda7538789dfb478bb7d028a0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ATR981283454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737c1ed830268e6b1e32e59585f8797882ac00d319017d8cbb40b655a42ca953. 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/ATR981284796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04aff3ddfbf9fbbfa8e1b8cdb8cf0ecbc1bf6d1bdb0ae0cb8896809e320f9167. 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/ATR981286613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26e9a1ec2eb9a6b32e28afcf73bb7eda01e91fb4b5cbbabc9ee5238497a525. 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/ATR981287210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38ba6f58f362ae2c4207efc7b097213e4a6aef8fbdf0d5049330bc09090dfa9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/ATR981290285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2553660375ff7777f93855d67aa063ae41e52b62e80ff6db480895d1eb8807d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ATR981292654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71d0da640e29aeafafc1a95010ec1744026a1c3fa3c0b55410b8fd3bd4426ec. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/ATR981293934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f3fd381b5eaa3b2f86d8227c7a86754ac0816adac67bc95ef0f870dd8c3de. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/ATR981305004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb688d21b574e79427ce2817bff325b9900aa27417d5b942d5ae17b64e0641f36. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATR981305251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a3993a8fd65ff76d19a1a438c9717813923d05b6845c13aeb17f3f6c4e0024. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ATR981308384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca7dd3df4c39c43de1259099976618eb984ac462916e2ed2e5a4826835b5446. 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/ATR981308938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acc3c5b759b08a203d5b0295e9283e589d8f031427b3e58e5da501ac24e4e31. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/ATR981310809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dabba9375d1b4408848317b4b85f59d3671450c01e702225ca567397bf7ab7e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ATR981317936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f07c4115a9ecc0a189f0121d0ee58e6f666d2640188267c4d89b974725f7fc5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ATR981319012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72856b29c4b8a995a58cb7559255611d275db1a5fc2871fa869cc7c3877a2456. 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/ATR981320465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb603460a1adb04a75f3f3136f68dbd552361e7e0a42e344adb82c4718eb715f8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/ATR981323291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097a8ca04249c6c55ba44d5f4ddf734b47a200f667bbc71af4dbd3a7cc78c0ce. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ATR981323986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7113719fa4d476b03459106500a37477069deef54cd91a2b3dd8ecbcc809627. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATR981324624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbee75b64c91f05c17be6b8884c5ee0d9ef4e81a9544571efdd40afbf881ab50. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ATR981326111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e37eb321e3b66188f259e3647c2e91e87310707d72f8797650f182f35b22feb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ATR981346504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32226965d59bd933cdbde6fd36bf487a1768d5a7243becdcc904e1091ae995d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATR981347455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c906d0a2cb99f0b40024a280812f326aae2487a7977d3b97d0f4dabde10785. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATJ600001157.