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 0x03c2f69eb33758e43617c6308fc4e6ed2b4c7281c317a070bf4ebbc0065f01c3. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5503a8b6-fdd1-4a59-99b3-6a682ccb13a8.json and https://artists.proofprofile.net/proofs/artist/5503a8b6-fdd1-4a59-99b3-6a682ccb13a8.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 0x9f67275d5047a5ba57b23aba596f4ccf521b6ad09202b11316b6c588811fc1e0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTVM2168051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2768c817acaf582fa05cf22e0bdf079cb8a2e039fcb0d77b31101619cc880ab8. 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/ES6642110025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ccfacb5023f741889b5faf7d0fb61f51ec64c87e1c4eefdac569bd6ed96e30. 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/CA5KR2155409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea4079cb8540308d08f1eb413e0ac8b5eb35da113a2b79510470c611f8bc9ff. 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/QZFZ62123885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0c939acf9b2a3a99faf0eade97469e8963cc67a127e2aeb608b789cd174c4f. 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/QZFZ62123886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c067a866f6af9e90164b7b719a0de15ac3ccf202922c7aa72bbfe6ddea1b24. 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/QZFZ62123887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d543b62a0782e599e559ebc0818b47f380fd2bd4b67278aabd4ea91fa0c811. 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/QZFZ62123888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0cacd28bef642b45905a07044307eaccd1b5157ecc222b8ffd2a3cb51dce68. 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/QZFZ62123889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7716f9e35109153bff066bcef022127fb66df401bd58b7c3eacbe9230bcb2dc2. 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/QZFZ62123890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412b14be58aceeb711daeb03359ac6f5ca5f20455b8d84860636f5e2b78f588. 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/QZFZ22156834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414bef14d8582d2c1d308a88353ea269a8b5400d99203c80725c32c0efd49406. 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/QZFZ62123891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1e284bd7f96dd67abfb89e2e101c378c8e5a40eb2a6dd75f498bf6b0074939. 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/QZFZ62123892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977658ddba05d1438b04e39cb0ee163fae232c52eaaa3d19fa7fdb7abf36462. 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/QZFZ62123893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad4466fa18e4f0415476ac253b60572c1f20eab33380d73fb9a4cdde4c4eafd. 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/QZFZ62123894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ee4cba5916f1f39b17bfc2553c58c93a7a98b84758990d6bb0708df2a1dbba. 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/QZFZ62123895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7cd03b00fafd9fe9c25785a44b669248d84116bf783e1aa6330ee5baaf20ff. 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/QZFZ62123896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ef8d81e3ffc121a14b6d8e3db91d2d289ba5e76809af77018408b792793a20. 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/QZFZ62123897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2693363ef7c5ee1eda49711b681cde367850418fb74838700e056d091d0c9901. 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/QZFZ62123898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2531a21d95ba1550b8571156ffd53049018b07f6d870c6b61375518f5d22d3b8. 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/QZFZ62123899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcfc65505785ea224636fdf2e509b454964f15f3a6e8246fd40a1af969804b4. 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/QZFZ62123900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f09faadc5b830d153ac89c8881cb26c8188ab519d775888febf067ba3d7517c. 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/QZFZ62123901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7467f4a84655952ec3fac93820c707ef4a1d5286c8ab39d7750994ea9ca93f1c. 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/QZFZ62123902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa331b06efba64f12d811d2695433a3915e801b066945405f76ac0dfc721bd2c8. 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/QZFZ62123903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc70d97743b3c47bcd650887ce0fe41b8fa215ed529ed664e0b1561a87df12ee. 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/QZFZ31978829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef8015bce889508a60ba9b319e22bfa7f8d86d4ed175ebdb0fd731312dc17e8. 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/QZFZ31978831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3eaba164468cb78aca3ba5e4d47c01596285fbd66fa9f615c4c4189189a689. 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/QZFZ31978832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb01514b7c2809a89619dddc6859ea39441ca4dee604022c88b8c09ebe68622c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:33Z), 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/QZFZ31978835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42453376cf42e4f37df49957db3fadfe7a9c6de29e418268acf179c5f9509b7c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:04Z), 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/QZFZ31978841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b00921843cc7909d4f47512a05b2b2197aa0941ecd2607e9647435dffa7ab14. 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/UKXN22241484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8358e224ff07b4210f55439569430ac989859769203674b784ab35fd32378f5. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:09Z), 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/UKXN22241485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae53ec1a638a1a8e59391aa456c75d67d694f28928aa37a24fd345a411595631. 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/UKXN22241486.