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 0x2acae67b0d54b47f15a17a3e7d2bf952964bd3c77604c423da672489e1a6083f. 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/1dc5bfd4-2b81-42cd-9a56-24bf02c8af8d.json and https://artists.proofprofile.net/proofs/artist/1dc5bfd4-2b81-42cd-9a56-24bf02c8af8d.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 0x7b724ce9284088d9ebdcbc9e2a81142d61e4152c17b9c4cf99f6077b2ec29c38. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZPJ32218570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cc3d34b2a5b2c1b0e290db0cb083d9b7ce964373fc7299e503693f17304743. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZPJ32218571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70127899f56497b97709e4d1e681e8874734676332a45a6b295c52e3023131c3. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZPJ32218572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120c553aff53e3c909bf7049fa0f7d57d6478574ac9efa629b7161a75cf00d97. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZPJ32218576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1970e3a49408054071b571f093a1ff5ba4a5b24307bd4e01d4ad6a79da9d72c6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPJ32218577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea17a434717c0c0047a52a25d76ea5079122b10234b554fab391a3d4274ec7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32169648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d087897749b3b948ef1a3e497cf61174ab1345ff0d18ed64985bbadd83d2d88. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPJ32248597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd77333989a80ffa3a22738eae8fb03d38d61b06b0d7ab37155a0ab2fb25e880. 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/QZPJ32248598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8db32b3730d6d0ebe37e1bb81f7bdea3cfb2eb81cfb5fd266c505ce1502ad9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPJ32248600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5fae801f022c93867f37d40fc73cde582a74687bb76bc81bf3fe3b4a354ed9. 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/QZPJ32248603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b9514531332017e6137adc9096a588dfae23d320b7edea85ae3a5ac7b22d8d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZPJ32248606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bd7071a126b59051e1884b812581a005f0c900b093e8dd8014187551096528. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZPJ32248607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d4a587b0b1cb967af261e48be88e4a63d9223b933cc35b6a142be2d9d53bc9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPJ32248609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d82ab6d06f3ca9242743f894aed883d44a3defddf12a417acf421d3174e48c4. 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/USL4Q2315004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c6df9af442a98ff44b530eb86725f4133bed7f485261ee45089cd9ecca36c7. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USL4Q2315005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c52f6b4c20639e2c72719941b1f367ec6da070f93247308d35bc36aae9d890. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4Q2315006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1944b6a30ea38f81929a05a707d71ac8b8bd63cecd8ea8117da1c426477ced. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USL4Q2315012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8ef12f03ecdb896720fa9b964f708b3872cae071cd36eaa874a33f133db857. 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/USL4Q2315013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd042b73aaf76adc6600408fb1dee55f05d3180ea3ab979305c9697d1e2f9a6ee. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4Q2315014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6316b7ce29ebdab53c6388d58fb3e721596a7b35d04149fc29d928913f04a888. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4Q2315015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2e79dabdeb7361d3d66a5b1eb8d195b90781abb4abb5e7a93d9901753dbdf8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4Q2315016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baeb6d49526b7275f1dca2fc7c628d553fe48a1cb890124c926662fcf23c767. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USL4Q2315017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd3b89ec14d7be952fcfe0dccf578ddcb55ba536fa9bbac0e61fe353e93ef1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q2315019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ea6f52068049ff18aace37f7cf6045320c4b59bc752ae0a7b7de5f4eba3f09. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4Q2315022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4f174d2ded7a5ffd69c5cfb247118fc2af4b1e1f5430a76b1665fc7ef59370. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USL4Q2315023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb1e583352347b7d997c59d896949ca3cf481e29869ec4f99167c4e8b4d574e. 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/USL4Q2315024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34808dd5ea4cc9a06ff96a2b6b13920aac234ca8be9cde9caab1cb9ff5254e15. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:47Z), 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/USL4Q2315026.