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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 0xb94aa7c2985ca2f5313514616379c618be23f3f10a0d84ba992b35940d2252d9. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e63cb8b-2d9b-45d4-a7dd-5ece4583381d.json and https://artists.proofprofile.net/proofs/artist/3e63cb8b-2d9b-45d4-a7dd-5ece4583381d.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 0xd44af9538f348d457fc34c9c0f6fdd2fbc79eda9b3bf590909ca7a0d8abd72d6. 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/USA2P2238420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3862068ab47ddc1fc70f8da2f44ec5bf074fb6b4410567f73c4ba5589a54cc. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USA2P2238425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078dcfc9c17e9c624b3097b31412064cc98f0167459ed07da9d6ea9ec45bdd8a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA2P2238426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df36ffa22284ca130a8c5cf1c83c3c0d21293e0bf25a7a56b10f13a46a799f2. 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/USA2P2238421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef82ecc5f600408b78bf5e6aa82c34adfc8d743dd6481ce01068599bda44542. 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/USA2P2238423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3ca8862737f2eed0c8576c0ef79a1dcf16744dd57cf96b84fd8c33f5433bba. 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/USA2P2238422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb58aebe0da3c19ad3f86904910121c9784a176e4b72ecb64ce19048b7f67f7. 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/USZZ81710065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb0a48d921c570f9061b4a574559a1a1182c2fc641db54b226701ab5bc882b6. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USZZ81710066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929228ad119fcec158bbebdaf0e66ba9c4527ff787d173fc10fef74de281b15f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USZZ81710067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9586f983223a4080bcbc4db93cf5a01d0d4e3bc46243ca3af581ef97f05f4ec. 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/USZZ81710068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757ccc2ace5f14389476c59301ae90abfff39fd9f925f503133020cf25e5d15. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USZZ81710069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6052e51ad4221bc5c8d43a2e54af85b6263ba5aead7af15a71293e111875ef65. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USZZ81710070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b7980a4ad75df4124ae5f02e29b1126267191ff9c66ee64fd1ff9fa654818. 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/USZZ81710071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048a7416a78fd1e9706b68f5c4f3539977149434bdd7ff30350ffb7a61dd7127. 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/USZZ81710072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5438e58376d794c949208012c68aacadf0d6822637482e7f1a37dfca458c91cd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USZZ81710073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd510301a7247b18833c2aef018872feaeb0b68b2434382e854840feb4e33ca. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USZZ81710075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cacb5e5a777f81a8e4ca3f6c38346e0a0422480e2feb22573b5549b6ebafcdd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USZZ81310413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472a78f331ff18c2e22568a388f9e617bc947659339fb33614dc3f01bfd8c0e4. 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/USZZ81310414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7333f895a7e304d7d577e22b378d7391ab31a25aba5356b02efeed986fbcf681. 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/USZZ81310415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186045166da303daf465c41273cc89fb96b8b3c76463ad42bb9f004d2fc8e2a. 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/USZZ81310416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f0d7f0e27d099ffa87d0c913cc04ab3a2a7dd677332b7c91d93a38b16f55a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USZZ81310417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742bac6b50e95f8bbe4420e6c26273b354ba872bb6737f56854ce608742593c7. 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/USZZ81310418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123e61130a149a911d40bdd86fd6b6aeea203bf27d9c395befcf7d1c7d61171. 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/USZZ81310419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c31e7774617de51e20b0eb18adbae720b9fd711147dec0e53e96e7773156aa. 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/USZZ81310420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3627718f8e38ace10a992af709cae0680d6617b246a832023bc4ffae76d1b50d. 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/USZZ81310421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8987dcf217cbe22b19f2e8cf1afd0e188c226c9f6a7ac1def0495fd51d455c5a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USZZ81310422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c98c4d1a30dee0c1296f5da44d2900d8887f0c7a5820ea21eab49dd73996a4. 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/USZZ81310423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4e520cd93507454055bb1c09b4e58ad062a98fb8df5c8f6c2d3a6ad9ae540. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2231366.