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 0xb53e41c4c5fd2a93661cb4f107f81120e143d8bb19dfc81bf042312ab208dd40. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b696731f-0ef9-431a-8c03-ac5fd4960618.json and https://artists.proofprofile.net/proofs/artist/b696731f-0ef9-431a-8c03-ac5fd4960618.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 0x117fa729eb631bfaab9a8938c05e648e1fa8f5a76b0a236462abcb276e42769b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZTB22378030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9bcbaa94baaed6c508da52427ff3dad0b772c318d4da6a6b5efb5621f40681. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:21Z), 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/QZTBF2339341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11ce70b9b84aa8f8d1100c8641f2be0a35a06267da4b7de3447697401b89c2c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:36:09Z), 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/QZWFF2384526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3a6ce33d23e472f5e3bb22f882974da69a9a83c91e10b15cd2fcaafbdae2bb. 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/QZWFJ2326314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e64e8f73f7c0649c085afa1a22366cc2846213caf24d881a217922f3663cf. 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/QZFYX2476731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1318f4022260ffd47f3cf569e61bc7eba773f58c0b2732e3a8cdcca4ca73442a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZFYZ2481253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc94dd9f8a26c817ab60bc0d72128bef975c2e4c8b753262e330804edd01079f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:42Z), 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/QZES62490176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f39f1fc4227fd00be7edeb8d7249cbc59703a5ef0c3a7416aa3fb102c1329. 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/QZTBD2374324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f37670920ad6a17f4d80287116486a344f09e6211ea96c5707a6edf0958eb89. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:58:17Z), 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/QZHN42410377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b14e701f08ade6d063ae6e42663a38b6246a4799db9b31291856cac1bd1a074. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6P2423447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83318ea124d2f4ce03b1667d871d2df3719724d607c971ac92769c88bdd444cf. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:34:18Z), 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/QZK6J2492321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69ef9246bd3ca763084b1e6d50d6340a2d1eb0590faa58601abe433177fc583. 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/QZMER2428182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c37f4cca567d702a2d69ac86455eff08fe2fdc38fdcf417791b4b2097445c80. 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/QZMER2428184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7560e6f9c432a12f155512d36c998af5cd9e04cc8b3b36484725db0ab2edc0e. 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/QZTAX2411541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b1e5a9275d343feadfed49444b5a87b513ba4041e177158e0aae7cffacce00. 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/QZTBA2457396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae521c819b0aed8477b4dbd5957e0cffc19cd9ec753ccb58aa1a39d9c54c82. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFL2478818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daa5a6907bf8e07697ac153946c8215b81d5711c27452b6bd3dd5bbeafcc7f0. 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/QZWFL2478819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a60bbecc4c4bc4d27d9a29d80b6153d59fb7ae636edc22bb5ec77299a6d92d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFV2469254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19afdd7282a6cc8ea25a9833fdea3b45a7f5e640ecbe9124aab1c813c0333167. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:04Z), 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/QT3EY2445071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf55b6ddb62ec555e3c70f3f6d5dcd991fdd686d4268dbcbe06792493711d093. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QT3EY2445072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee90eb3419706d433bda324f5d8950230f5af0caf4e01ef4743734774450b71. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:26:38Z), 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/QT3EY2445073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8a736e10d6dadacc73eb19c8fc597976cc9b3829e64162277e28a7f761c3dd. 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/QT3EY2445074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6397a54307833bfb004f4292f9dc85c6aceee1fbbc3363be7467f62f3f63ab. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:37Z), 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/QT3EY2445075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88baa2514fc2cae752fb6b72c8b717b6490cb9ec136fb834c554b48f465c9c32. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES52532713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065a63945f18215e946a7aa66c345f82bee597cc374ce3a5a3372cb1830a2ace. 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/QZHN52539167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b91100a2efb9eca0049a1667fa5b0570ae507f5666f3dbd877d64cbb84838f. 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/QZK6H2518236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023174b7550b09aece2ade1e5663c57ad76980a78125f3c1f54a1d61ab42755. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:47:10Z), 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/QZK6H2518237.