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 0x72d2df6e36af9c7aaddccf2341c7ade38bb64935e81776ec82895945c828db95. 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/0ad060cd-8559-4290-919b-1cc150806c62.json and https://artists.proofprofile.net/proofs/artist/0ad060cd-8559-4290-919b-1cc150806c62.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 0xb79020baa2b177ada2f16ceba588710f43640de81339f1f1c890ad73d64bb916. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S2119086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a0207d82b6e4869b244409e108a5929b5400f156d6d13bc492d98583d04d5c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/MYPC32010015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a67f891c034e1d354a70986b6cc84fa237c044eeeedbcc760c1060e5f901bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYPC32010016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03038b708a2d507183b35403016146ff4a7eeeb21a4c2b95eea48507f809cadf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/MYPC32010017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea56e0d6d7a4ce03af4b07a5fc1139704991b6677b43be6f422527553b0fa2. 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/MYPC32010019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0516c14d683a067fdcfdbd54bb470c680286f8b7ae75414dd585b3cff077ba3e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/MYPC32010024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb80ed7d3985a3a781f2e76c1fde99ce5b2d34adc430b748a5d45d0d4e8bb8. 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/MYUM82100186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8101a5996497fb596bad75ba2cb8096f17cc86ee652d22a4da1227f7d7f26bf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MYMA11900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95652730b9e565fc2f302e95ec8b86dc56369dab75b643d0b0f59f4975f9eee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYMA11900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e365b42f09e1a45643f59f3b1a35f01a0c659c3115abb0d1860c0c2bf3cb63. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYMA11900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f33d92bcb3248c9c8e7ac63cbfa5d7d14a6d6c7b607733c875d01efa85f1f45. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MYMA11900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d4ce363b0b971de28aeb16dd62352e63ee9ec0e471f52054d69658eda16581. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYMA11900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d70a0d7db50c7781a9c3380e8786a39920c754f953e0b8ad2af82f5db5933b2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYMA11900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3579c3abc48637bbea5cc313d40f3733c124404f8d085757535fe98606d87fe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MYMA11900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3997085258f95f11141473ba9aa81acc6b35c98c330ea5a24448d208a2c645. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/MYNV11400742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb0c06632128d2298c799dd8b7adf71a8ea95056b721ef6e74ae2fbc2c11bf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MYNV11400744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf947fc6c80b7a25d9ced84f95f0eb3c850c11025d815cd5c12f247de60d24f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYNV11400746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e633b30120be1fdcb385e15e631311d13482b2f27ec454d742d8df0a56f4c4f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/MYNV11400748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b009e109399cb9ea3a4867af314d97d3c23f9095795ef6f91807ea42c0a28. 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/MYLO32410032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3533b23e23bb319a3696311c4f66956dc7eb0cde5be95d83cac03d3f27f690. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MYMA11800513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2c5f7dae978b7c6ecfb02900c45de331fce73d47282ed46a9a38da8499a80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYMA11600930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3e03bdeaa938e47a2c212bfbed1f8db35ec12dc7eabc8f920275734400c829. 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/MYMA11500153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f39ca61940904acfc640f63de0b90360451123403d7d393454bd23d70105c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MYMA11500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61802f22486f0703054cd986e181d6bc9cae2623b09f7001c3d3b8202138eb. 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/MYMA11500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd09796cb3e4928787efba36202a5350783ae311b7fd312d91367f44edbf6ea2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MYMA11500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a67f891c034e1d354a70986b6cc84fa237c044eeeedbcc760c1060e5f901bf. 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/MYPC32010016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded179fa2881d03aabe679b78d31a4179abecfeecac5a382fc9c2b05e6fef724. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYSN12500050.