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 0x07de6f57b17d23ecf8c68828bba9998ec8e40e2d8faed5cece720d84e4c41bf4. 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/6261e725-4f96-4877-b49e-18caba7b587c.json and https://artists.proofprofile.net/proofs/artist/6261e725-4f96-4877-b49e-18caba7b587c.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 0xb181ccbb6965db3b267f4038836f4bb98e215c8ad0e7c4f77255e0202c25c974. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BX44O2302471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc953bfa8b28ccaf32e7fd8c6405c9f9465cc6cd590af0126e0522c56b010ab. 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/BX44O2302472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73294643b3e2782a9c39a2ff5431c01c65b58c04911bae4065579014e4587790. 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/BX44O2300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a3ba4cd26c26b9fbf95c81b6479907d7f6886b0f9ff87db9d3c8ec8a89b23b. 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/BX44O2300858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f47d545e2adad82e076d7883cf9ec2133aadb1bef93697e205f1ad084e213c. 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/BX44O2300859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd525283dcdbd450e79cf0d09633dab6bc516d98d7df2cd698de52a3a0011374e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BX44O2400599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b92f7be8dc2b838263cb4f3a20388a09397d2a6bfb43d0b5ef00ed9929f81. 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/BX44O2400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b73b5b3e919aa3bde7063a1988cddd1252e153c69ca8e757ccc47fcb4f604. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX44O2302206.
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 0x3045f6d5b609e4144a631da940416234a56f0e7a933eb0e107dfe210433e4b01. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BX44O2302208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26782d46d3b9a74caf58694b8a328c172b31e6bcf091368ca700fd934968aa52. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BX44O2302207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd0bec6038468a591b6f1bb7db09e7089d0a4584dcb4a6d083b54acc4de002. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BX44O2302209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287061f92117e9d7912948530c5fa702db1b75e68cd1df7e188b32f58bc1c22c. 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/BX44O2300854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99194054eefbdde3149a5cf6ba3a123e6a3bfddaeb66e796b4bdbddc1aefa47c. 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/BX44O2300853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6e6289f8c5f889dd6658e3c39f8a94b6bc1afb8dc83d80ddead39188c1a81. 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/BX44O2300855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda558c44d95ab5eb6043c5c0b1fcfa17bb88401eec861c2f767ca49f37f0ee9. 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/BX44O2400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099b2fdfb6b90c59225cfcfa3127cb944e415ef1859d36fde896a029ffd5e8e6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BX44O2400190.